Chapter XCIII: Act 1903: , the powers and duties of the Board of Trade under the (18)

In the United Kingdom this ``denaturized'' alcohol is known as methylated spirit as a distinction from pure alcohol or ``spirits of wine.'' It was first enacted in 1855 that methylated spirit, a specific mixture of pure alcohol and wood- naphtha, should be duty-free; the present law is to be found in the Customs and Inland Revenue Act of 1890, and the Finance Act (sect. 8) of 1902. From 1858 to 1861 methylated spirit was duty-free when it was required for manufacturing processes, and the methylation or ``denaturizing'' was carried out in accordance with a prescribed process. During the next three decades (1861-1891) the law was extended, and methylated spirit was duty-free for all purposes except for use as beverages and internal medicinal applications. This spirit (``unmineralized methylated spirit'') consisted of 90 parts of alcohol of 60-66 over-proof (91-95% of pure alcohol) and 10 parts of wood-naphtha. It was found, however, that certain classes were addicted to drinking this mixture, and since 1891 the sale of such spirit has been confined to manufacturers who must purchase it in bulk from the ``methylators.'' For retail purposes the ``ordinary'' methylated spirit is mixed with .357% of mineral naphtha, which has the effect of rendering it quite undrinkable. The Finance Act of 1902 allows a manufacturer to obtain a license which permits the use of duty-free alcohol, if he can show that such alcohol is absolutely essential for the success of his business, and that methylated spirit is unsuitable. Notwithstanding this permission there have been many agitations on the part of chemical manufacturers to obtain a less restricted use of absolute alcohol, and in 1905 an Industrial Alcohol Committee was appointed to receive evidence and report as to whether any modification of the present law was advisable. In the United States the same question was considered in 1896 by a Joint Select Committee on the use of alcohol in the manufactures and arts. Reference should be made to the reports of these committees for a full account of the use, manufacture and statistics of ``denaturized'' spirits in various European countries.

In Germany, the use of duty-free spirit is only allowed to state and municipal hospitals, and state scientific institutions, and for the manufacture of fulminates, fuzes and smokeless powders. The duty-free ``denaturized'' spirits may be divided into two groups--``completely denaturized'' and ``incompletely denaturized.'' In the first category there are two varieties:--(1) A mixture of 100 litres of spirit and 2 1/2 litres of a mixture of 4 parts of wood-naphtha and 1 of pyridine bases; this spirit, the use of which is practically limited to heating and lighting purposes, may be mixed with 50 grs. of lavender or rosemary, in order to destroy the noxious odour of the pyridine bases. (2) A mixture of 100 litres of spirit, 1 1/4 litres of the naphtha-pyridine mixture described above, 1/4 litre of methyl violet solution, and from 2 to 20 litres of benzol; this fluid is limited to combustion in motors and agricultural engines. The second category, or ``incompletely denaturized'' spirits, include numerous mixtures. The ``general'' mixture consists of 100 litres of spirit, and 5 litres of wood spirit or 1/2 litre of pyridine. Of the ``particular'' varieties, we can only notice those used in the colour industry. These consist of 100 litres of spirit mixed with either 10 litres of sulphuric ether, or 1 litre of benzol, or 1/2 litre of turpentine, or .025 litre of animal oil.

The German regulations are apparently based on a keen appreciation of the fact that while one particular denaturizing agent may have little or no effect on one industry, yet it would be quite fatal to the success of another; there is consequently a great choice of denaturizing agents, and in certain cases it is sufficient to mix the alcohol with a reagent necessary for the purpose in hand, or even with a certain amount of the final product, it being only necessary to satisfy the state that the spirit is not available as a beverage.

In France, the general denaturizing agent is wood-spirit of at least 58 over-proof, and containing 25% of acetone and 2.5% of ``impurites pyrogenees''; 10 litres of this spirit denaturizes 100 litres of alcohol. This mixture is supplied to manufacturers and corresponds to the British unmineralized methylated spirit; but the regulations are more stringent. When sold for lighting and heating purposes, it is further admixed with 0.5% of heavy benzene boiling at 150 deg. -200 deg. C. Provisions are also made for special denaturizing processes as in Germany.

In America the internal revenue tax on denaturized alcohol (formerly duty-free only to scientific institutions) was removed by Congress in 1906 (act of June 7th).

Pharmacology, Toxicology and Therapeutics of Alcohol.-- Alcohol is of great medicinal value as a solvent, being used to form solutions of alkaloids, resins, volatile oils, iodoform, &c. In strength of about 10% and upwards it is an antiseptic. If applied to the skin it rapidly evaporates, thereby cooling the skin and diminishing the amount of sweat excreted. This refrigerant and anhidrotic action is employed to soothe many forms of headache by bathing the forehead with eau de Cologne. If, on the other hand, the alcohol be rubbed into the skin, or if its evaporation be prevented--as by a watch-glass--it absorbs water from the tissues and thus hardens them.

Thoroughly rubbed into the skin alcohol dilates the blood- vessels and produces a mild counter-irritant effect. Many alcoholic liniments are therefore employed for the relief of pain, especially muscular pains, as in lumbago and other forms of so-called ``muscular rheumatism.'' Given internally in small quantities and in sufficient dilution, alcohol causes dilatation of the gastric blood-vessels, increased secretion of gastric juice, and greater activity in the movements of the muscular layers in the wall of the stomach. It also tends to lessen the sensibility of the stomach and so may relieve gastric pain. In a 50% solution or stronger--as when neat whisky is taken--alcohol precipitates the pepsin which is an essential of gastric digestion, and thereby arrests this process. The desirable effects produced by alcohol on the stomach are worth obtaining only in cases of acute diseases. In chronic disease and in health the use of alcohol as an aid to digestion is without the support of clinical or laboratory experience, the beneficial action being at least neutralized by undesirable effects produced elsewhere. The continued use of large doses of alcohol produces chronic gastritis, in which the continued irritation has led to overgrowth of connective tissue, atrophy of the gastric glands and permanent cessation of the gastric functions.

A single dose of concentrated alcohol (e.g. brandy) produces very valuable reflex effects, the heart beating more rapidly and forcibly, and the blood-pressure rising. Hence the immediately beneficial effect produced in the cases of ``fainting'' or syncope. After absorption, which is very rapid, alcohol exerts a marked action upon the blood. The oxygen contained in that fluid, and destined for consumption by the tissues, is retained by the influence of alcohol in its combination with the haemoglobin or colouring matter of the red blood corpuscles. Hence the diminished oxidation of the tissues, which leads to the accumulation of unused fat and so to the obesity which is so often seen in those who habitually take much alcohol. The drug exerts a noteworthy action upon the body-temperature. As it dilates the blood-vessels of the skin it increases the subjective sensation of warmth. The actual consequence, however, is that more heat than before is necessarily lost from the surface of the body. Alcohol also diminishes the oxidation which is the main source of the body-heat. It follows that the drug is an antipyretic, and it is hence largely used in fevers as a means of reducing the temperature. This reduction of the temperature, carried to an undesirable extreme, is the reason why the man who has copiously consumed spirits ``to keep out the cold'' is often visited with pneumonia. The largest amount of alcohol that can be burnt up within the healthy body in twenty-four hours is 1 1/2 oz., but it must be consumed in great dilution and divided into small doses taken every four hours. Otherwise the alcohol will for the most part leave the body unused in the urine and the expired air. In fever the case is different. The raised temperature appears to facilitate the oxidation of the substance, so that quantiries may be taken and completely utilized which would completely intoxicate the individual had his temperature been normal. It follows that alcohol is a food in fever, and its value in this regard is greatly increased by the fact that it requires no primary digestion, but passes without changes, and without needing change, to the tissues which are to use it. According to Sir Thomas Fraser nothing else can compete with alcohol as a food in desperate febrile cases, and to this use must be added its antipyretic power already explained and its action as a soporific. During its administration in febrile cases the drug must be most carefully watched, as its action may prove deleterious to the nervous system and the circulation in certain classes of patient. The state of the pulse is the best criterion of the action of alcohol in any given case of fever. The toxicology of alcohol is treated in other articles. It includes acute alcoholism (i.e. intoxication), chronic alcoholism, delirium tremens, and all the countless pathological changes--extending to every tissue but the bones, and especially marked in the nervous system-- which alcohol produces. (See DRUNKENNESS: DELIRIUM.)

After death the presence of alcohol can be detected in all the body fluids. Its especial affinity for the nervous system is indicated by the fact that, when all traces of it have disappeared elsewhere, it can still be detected with ease in the cerebro-spinal fluid.

ALCOHOLS, in organic chemistry, a class of compounds which may be considered as derived from hydrocarbons by the replacement of one or more hydrogen atoms by hydroxyl groups. It is convenient to restrict the term to compounds in which the hydroxyl group is attached to an aliphatic residue; this excludes such compounds as the hydroxy-benzenes, naphthalenes, &c., which exhibit many differences from the compounds derived from the aliphatic alkyls.

Alcohols are classified on two distinct principles, one depending upon the number of hydroxyl groups present, the other on the nature of the remaining groups attached to the carbon atom which carries the hydroxyl group. Monatomic or monohydric alcohols contain only one hydroxyl group; diatomic, two, known as glycols (q.v.); triatomic, three, known as glycerols (q.v.); and so on.

The second principle leads to alcohols of three distinct types, known as primary, secondary and tertiary. The genesis and formulation of these types may be readily understood by considering the relation which exists between the alcohols and the parent hydrocarbon. In methane, CH4, the hydrogen atoms are of equal value, and hence only one alcohol, viz. CH3OH, can be derived from it. This compound, methyl alcohol, is the simplest primary alcohol, and it is characterized by the grouping .CH2OH. Ethane, C2H6, in a similar manner, can only give rise to one alcohol, namely ethyl alcohol, CH3CH2OH, which is also primary. Propane, CH3CH2CH3, can give rise to two alcohols --a primary alcohol, CH3CH2CH2OH (normal propyl alcohol), formed by replacing a hydrogen atom attached to a terminal carbon atom, and a secondary alcohol, CH3.CH(OH).CH3 (isopropyl alcohol), when the substitution is effected on the middle carbon atom. The grouping CH.OH characterizes the secondary alcohols; isopropyl alcohol is the simplest member of this class. Butane, C4H10, exists in the two isomeric forms--normal butane, CH3.CH2.CH2.CH3, and iso-butane, CH(CH3)3. Each of these hydro-carbons gives rise to two alcohols: n-butane gives a primary and a secondary; and iso-butane a primary, when the substitution takes place in one of the methyl groups, and a tertiary, when the hydrogen atom of the :CH group is substituted. Tertiary alcohols are thus seen to be characterized by the group :C.OH, in which the residual valencies of the carbon atom are attached to alkyl groups.

In 1860 Hermann Kolbe predicted the existence of secondary and tertiary alcohols from theoretical considerations. Regarding methyl alcohol, for which he proposed the name carbinol, as the simplest alcohol, he showed that by replacing one hydrogen atom of the methyl group by an alkyl residue, compounds of the general formula R.CH2.OH would result. These are the primary alcohols. By replacing two of the hydrogen atoms, either by the same or different alkyls, compounds of the formula (R.R1)CH.OH (i.e. secondary alcohols) would result; while the replacement of the three hydrogen atoms would generate alcohols of the general formula (R.R1.R2)C.OH, i.e. tertiary alcohols. Furthermore, he exhibited a comparison between these three types of alcohols and the amines. Thus:--

R.NH2 (R1R2)NH (R1R2R3)N R.CH2OH (R1R2)CH.OH (R1R2R3)C.OH Primary. Secondary. Tertiary. To distinguish Priinary, Secondary and Tertiary Alcohols.-- Many reactions serve to distinguish these three types of alcohols. Of chief importance is their behaviour on oxidation. The primary alcohols are first oxidized to aldehydes (q.v.), which, on further oxidation, yield acids containing the same number of carbon atoms as in the original alcohol. Secondary alcohols yield ketones q.v.), which are subsequently oxidized to a mixture of two acids, Tertiary alcohols yield neither aldehydes nor ketones, but a mixture of two or more acids. Another method is based upon the different behaviour of the corresponding nitro-alkyl with nitrous acid. The alcohol is first acted upon with phosphorus and iodine, and the resulting alkyl iodide is treated with silver nitrite, which gives the corresponding nitro-alkyl. The nitro-alkyl is then treated with potassium nitrite dissolved in concentrated potash, and sulphuric acid is added. By this treatment a primary nitro-alkyl yields a nitrolic acid, the potassium salt of which forms an intense red solution; a secondary nitro-alkyl forms a pseudo nitrol, which gives an intense blue solution, while the tertiary compound does not act with nitrous acid. The reactions outlined above may be thus represented:--

//NOH
R.CH2OH --> R.CH2I --> R.CH2.NO2 --> R.C<
Primary alcohol. \NO2
Nitrolic acid.

R\ R\ R\ /NO2
>CH.OH --> >CH.I --> >CH.NO2 --> >C<
R1/ R1/ R1/ \NO
Secondary alcohol. Pseudo nitrol.

(R1R2R3)C.OH --> (R1R2R3)C.I --> (R1R2R3)C.NO2
Tertiary alcohol.

By heating to the boiling point of naphthalene (218 deg. ) tertiary alcohols are decomposed, while heating to the boiling point of anthracene (360 deg. ) suffices to decompose secondary alcohols, the primary remaining unaffected. These changes can be followed out by determinations of the vapour density, and so provide a method for characterizing alcohols (see Compt. Rend. 1904, 138, p. 984).

Preparation.

Alcohols may be readily prepared from the corresponding alkyl haloid by the action of moist silver oxide (which behaves as silver hydroxide): by the saponification of their esters; or by the reduction of polyhydric alcohols with hydriodic acid, and the subsequent conversion of the resulting alkyl iodide into the alcohol by moist silver oxide. Primary alcohols are obtained by decomposing their sulphuric acid esters (from sulphuric acid and the olefines) with boiling water; by the action of nitrous acid on primary amines; or by the reduction of aldehydes, acid chlorides or acid anhydrides. Secondary alcohols result from the reduction of ketones; and from the reaction of zinc alkyls on aldehydes or formic acid esters.

/C2H5 /C2H5
CH3CHO --> CH3.CH< --> CH3.CH<
\OZnC2H5 \OH
Acetaldehyde. Methyl ethyl carbinol.

//O /OZnCH3 /CH3 /CH3
HC</ --> HC<-CH3 --> R.C<-OZnCH3 --> R.C<-OH
\OC2H5 \Cl \CH3 \CH3
Formic ester. Isopropyl alcohol.

Tertiary alcohols may be synthesized by a method devised by A. Butlerow in 1864, who thus discovered the tertiary alcohols. By reacting with a zinc alkyl (methyl or ethyl) on an acid chloride, an addition compound is first formed, which decomposes with water to give a ketone. If, however, a second molecule of a zinc alkyl be allowed to react, a compound is formed which gives a tertiary alcohol when decomposed with water.

//O /CH3 /CH3 /CH3
R.C</ --> R.C<-OZnCH3 --> R.C<-OZnCH3 --> R.C<-OH
\Cl \Cl \CH3 \CH3
Acid chloride. Tertiary alcohol.

It is interesting to note that, whereas zinc methyl and ethyl give tertiary alcohols, zinc propyl only gives secondary alcohols. During recent years (1900 onwards) many brilliant syntheses have been effected by the aid of magnesium-alkyl-haloids.

Properties.

The alcohols are neutral in reaction, and the lower members possess the property of entering into combination with salts, in which the alcohol plays the role of water of crystallization. Sodium or potassium dissolves in them with the formation of alcoholates, the hydrogen of the hydroxyl group being replaced by the metal. With strong acids water is split off and esters are formed. The haloid esters of the paraffin alcohols formed by heating the alcohols with the halogen acids are the monohaloid derivatives of the paraffins, and are more conveniently prepared by the action of the phosphorous haloid on the alcohol. Energetic dehydration gives the olefine hydrocarbons, but under certain conditions ethers (see ETHER) are obtained.

The physical properties of the alcohols exhibit a gradation with the increase of molecular weight. The lower members are colourless mobile liquids, readily soluble in water and exhibiting a characteristic odour and taste. The solubility decreases as the carbon content rises. The normal alcohols containing 1 to 16 carbon atoms are liquids at the ordinary temperatures; the higher members are crystalline, odourless and tasteless solids, closely resembling the fats in appearance. The boiling points of the normal alcohols increase regularly about 10 deg. for each CH2 increment; this is characteristic of all homologous series of organic compounds. Of the primary, secondary and tertiary alcohols having the same empirical formula, the primary have the highest, and the tertiary the lowest boiling point; this is in accordance with the fairly general rule that a gain in symmetry is attended by a fall in the boiling point.

The following monatomic alcohols receive special treatment under their own headings:--ALCOHOL (ETHYL), ALLYL ALCOHOL, AMYL, ALCOHOLS, BEN zsqrt. L ALCOHOL, BUTYL ALcohols, METHY L ALcohol, and PROPYL ALCOHOLS.

ALCOTT, AMOS BRONSON (1799-1888), American educationalist and writer, born on Spindle Hill, in the town of Wolcott, New Haven county, Connecticut, on the 29th of November 1799. His father, Joseph Chatfield Alcox, was a farmer and mechanic whose ancestors, then bearing the name of Alcocke, had setlled in eastern Massachusetts in colonial days. The son adopted the spelling ``Alcott'' in his early youth. Self-educated and early thrown upon his own resources, he began in 1814 to earn his living by working in a clock factory in Plymouth, Conn., and for many years after 1815 he peddled books and merchardise, chiefly in the southern states. He began teaching in Bristol, Conn., in 1823, and subsequently conducted schools in Cheshire, Conn., in 1825-1827, again in Bristol in 1827-1828, in Boston in 1828-1830, in Germantown, now part of Philadelphia, in 1831-1833, and in Philadelphia in 1833. In 1830 he had mariied Abby May, the sister of Samuel J. May (1797-1871), the reformer and abolitionist. In 1834 he opened in Boston a school which became famous because of his original methods; his plan being to develop self-instruction on the basis of self-analysis, with an ever-present desire on his own part to stimulate the child's personality. The feature of his school which attracted most attention, perhaps, was his scheme for the teacher's receiving punishment, in certain circumstances, at the hands of an offending pupil, whereby the sense of shame might be quickened in the mind of the errant child. The school was denounced in the press, was not pecuniarily successful, and in 1839 was given up, although Alcott had won the affection of his pupils, and his educational experiments had challenged the attention of students of pedagogy. The school is perhaps best described in Miss E. P. Peabody's A Record of Mr Alcott's School (1835). In 1840 Alcott removed to Concord, Massachusetts. After a visit to England, in 1842, he started with two English associates, Charles Lane and Henry C. Wright, at ``Fruitlands,'' in the town of Harvard, Massachusetts, a communistic experiment at farm-living and nature-meditation as tending to develop the best powers of body and soul. This speedily came to naught, and Alcott returned (1844) to his home near that of Emerson in Concord, removing to Boston four years later, and again living in Concord after 1857. He spoke, as opportunity offered, before the ``lyceums'' then common in various parts of the United States, or addressed groups of hearers as they invited him. These ``conversations,'' as he called them, were more or less informal talks on a great range of topics, spiritual, aesthetic and practical, in which he emphasized the ideas of the school of American Transcendentalists led by Emerson, who was always his supporter and discreet admirer. He dwelt upon the illumination of the mind and soul by direct communion with the Creative Spirit; upon the spiritual and poetic monitions of external nature; and upon the benefit to man of a serene mood and a simple way of life. As regards the trend and results of Alcott's philosophic teaching, it must be said that, like Emerson, he was sometimes inconsistent, hazy or abrupt. But though he formulated no system of philosophy, and seemed to show the influence now of Plato, now of Kant, or of German thought as filtered through the brain of Coleridge, he was, like his American master, associate and friend, steadily optimistic, idealistic, individualistic. The teachings of William Ellery Channing a little before, as to the sacred inviolability of the human conscience--anticipating the later conclusions of Martineau--really lay at the basis of the work of most of the Concord transcendentalists and contributors to The Dial, of whom Alcott was one. In his last years, living in a serene and beautiful old age in his Concord home, the Orchard House,where every comfort was provided by his daughter Louisa (q.v.), Alcott was gratified at being able to become the nominal, and at times the actual, head of a Concord ``Summer School of Philosophy and Literature,'' which had its first session in 1879, and in which --in a rudely fashioned building next his house--thoughtful listeners were addressed during a part of several successive summer seasons on many themes in philosophy, religion and letters. Of Alcott's published works the most important is Tablets (1868); next in order of merit is Concord Days (1872). His Sonnets and Canzonets (1882) are chiefly interesting as an old man's experiments in verse. He left a large collection of personal jottings and memorabilia, most of which remain unpublished. He died in Boston on the 4th of March 1888. Alcott was a Garrisonian abolitionist.

See A. Bronson Alcott, His Life and Philosophy (2 vols., Boston, 1893), by F. B. Sanborn and William T. Harris; New Connecticut: an Autobiographical Poem (Boston, 1887), edited by F. B. Sanborn; and Lowell's criticism in his Fable for Critics. (C. F. R.)

ALCOTT, LOUISA MAY (1832-1888), American author, was the daughter of Amos Bronson Alcott, and though of New England parentage and residence, was born in Germantown, now part of Philadelphia, Pennsylvania, on the 29th of November 1832. She began work at an early age as an occasional teacher and as a writer--her first book was Flower Fables (1854), tales originally written for Ellen, daughter of R. W. Emerson. In 1860 she began writing for the Atlantic Monthly, and she was nurse in the Union Hospital at Georgetown, D.C., for six weeks in 1862-1863. Her home letters, revised and published in the Commonwealth and collected as Hospital Sketches (1863, republished with additions in 1869), displayed some power of observation and record; and Moods, a novel (1864), despite its uncertainty of method and of touch, gave considerable promise. She soon turned, however, to the rapid production of stories for girls, and, with the exception of the cheery tale entitled Work (1873), and the anonymous novelette A Modern Mephistopheles (1877), which attracted little notice, she did not return to the more ambitious fields of the novelist. Her success dated from the appearance of the first series of Little Women: or Meg, Jo, Beth and Amy (1868), in which, with unfailing humour, freshness and lifelikeness, she put into story form many of the sayings and doings of herself and sisters. Little Men (1871) similarly treated the character and ways of her nephews in the Orchard House in Concord, Massachusetts, in which Miss Alcott's industry had now established her parents and other members of the Alcott family; but most of her later volumes, An Old-Fashioned Girl (1870), Aunt Jo's Scrap Bag (6 vols., 1871-1879), Rose in Bloom (1876), &c., followed in the line of Little Women, of which the author's large and loyal public never wearied. Her natural love of labour, her wide-reaching generosity, her quick perception and her fondness for sharing with her many readers that cheery humour which radiated from her personality and her books, led her to produce stories of a diminishing value, and at last she succumbed to overwork, dying in Boston on the 6th of March 1888, two days after the death of her father in the same city. Miss Alcott's early education had partly been given by the naturalist Thoreau, but had chiefly been in the hands of her father; and in her girlhood and early womanhood she had fully shared the trials and poverty incident to the life of a peripatetic idealist. In a newspaper sketch entitled ``Transcendental Wild Oats,'' afterwards reprinted in the volume Silver Pitchers (1876), she narrated, with a delicate humour, which showed what her literary powers might have been if freed from drudgery, the experiences of her family during an experiment towards communistic ``plain living and high thinking'' at ``Fruitlands,'' in the town of Harvard, Massachusetts, in 1843.

The story of her career has been fully and frankly told in Mrs Ednah D. Cheney's Louisa May Alcott: Her Life, Letters and Journals (Boston, 1889). (C. F. R.)

ALCOVE (through the Span. alcova, from the Arab. al-, the, and quobbah, a vault), an architectural term for a recess in a room usually screened off by pillars, balustrade or drapery.

ALCOY, a town of south-eastern Spain, in the province of Alicante, on the small river Serpis, and at the terminus of a branch railway connected with the Barcelona-Valencia-Alicante line. Pop. (1900) 32,053. Alcoy is built on high ground at the entrance to a gorge in the Moncabrer range (4547 ft.). It is a thriving industrial town, devoid of any great antiquarian or architectural interest, though founded by the Moors. It owes its prosperity to its manufacture of linen, woolen goods and paper, especially cigarette paper. Many of the factories derive their motive power from the falls of a mountain torrent, known as the Salto de las Aguas. Labour disturbances are frequent, for, like Barcelona, Alcoy has become one of the centres of socialistic and revolutionary agitation, while preserving many old-fashioned customs and traditions, such as the curious festival held annually in April in honour of St George, the patron saint of the town.

COCENTAINA (pop. 1900, 7093) is a picturesque and ancient town, 4 m. N.E. by rail. It is surrounded by Roman walls, which were partly rebuilt by the Moors, and it contains an interesting fortified palace, owned by the dukes of Medinaceli.

For an account of the festival of St George of Alcoy, see Apuntes historicos acerca de las fiestas que celebra cada ano la ciudad de Alcoy a su patron San Jorge, by J. A. Llobet y Vallosera (Alcoy, 1853).

ALCUIN (ALCHUINE), a celebrated ecclesiastic and man of learning in the 8th century, who liked to be called by the Latin name of ALBINUS, and at the Academy of the palace took the surname of FLACCUS, was born at Eboracum (York) in 735. He was related to Willibrord, the first bishop of Utrecht, whose biography he afterwards wrote. He was educated at the cathedral school of York, under the celebrated master AElbert, with whom he also went to Rome in search of manuscripts. When AElbert was appointed archbishop of York in 766, Alcuin succeeded him in the headship of the episcopal school. He again went to Rome in 780, to fetch the pallium for Archbishop Eanbald, and at Parma met Charlemagne, who persuaded him to come to his court, and gave him the possession of the great abbeys of Ferrieres and of Saint-Loup at Troyes. The king counted on him to accomplish the great work which was his dream, namely, to make the Franks familiar with the rules of the Latin language, to create schools and to revive learning. From 781 to 790 Alcuin was his sovereign's principal helper in this enterprise. He had as pupils the king of the Franks, the members of his family and the young clerics attached to the palace chapel; he was the life and soul of the Academy of the palace, and we have still, in the Dialogue of Pepin (son of Charlemagne) and Alcuin, a sample of the intellectual exercises in which they indulged. It was under his inspiration that Charles wrote his famous letter de litteris colendis (Boretius, Capitularia, i. p. 78), and it was he who founded a fine library in the palace. In 790 Alcuin returned to his own country, to which he had always been greatly attached, and stayed there some time; but Charlemagne needed him to combat the Adoptianist heresy, which was at that time making great progress in the marches of Spain. At the council of Frankfort in 794 Alcuin upheld the orthodox doctrine, and obtained the condemnation of the heresiarch Felix of Urgel. After this victory he again returned to his own land, but on account of the disturbances which broke out there, and which led to the death of King AEthelred (796), he bade farewell to it for ever. Charlemagne had just given him the great abbey of St Martin at Tours, and there, far from the disturbed life of the court, he passed his last years. He made the abbey school into a model of excellence, and many students flocked to it; he had numerous manuscripts copied, the calligraphy of which is of extraordinary beauty (v. Leopold Delisle in the Memoires de l'Academie des Inscriptions, vol. xxxii., 1st part, 1885) . He wrote numerous letters to his friends in England, to Arno, bishop of Salzburg, and above all to Charlemagne. These letters, of which 311 are extant, are filled chiefly with pious meditations, but they further form a mine of information as to the literary and social conditions of the time, and are the most reliable authority for the history of humanism in the Carolingian age. He also trained the numerous monks of the abbey in piety, and it was in the midst of these pursuits that he was struck down by death on the 19th of May 804.

Alcuin is the most prominent figure of the Carolingian Renaissance, in which have been distinguished three main periods: in the first of these, up to the arrival of Alcuin at the court, the Italians occupy the chief place; in the second, Alcuin and the Anglo-Saxons are dominant; in the third, which begins in 804, the influence of the Goth Theodulf is preponderant. Alcuin transmitted to the ignorant Franks the knowledge of Latin culture which had existed in England since the time of Bede. We still have a number of his works. His letters have already been mentioned; his poetry is equally interesting. Besides some graceful epistles in the style of Fortunatus, he wrote some long poems, and notably a whole history in verse of the church at York: Versus de patribus, regibus et sanctis Eboracensis ecclesiae. We owe to him, too, some manuals used in his educational work; a grammar and works on rhetoric and dialectics. They are written in the form of dialogues, and in the two last the interlocutors are King Charles and Alcuin. He wrote, finally, several theological treatises: a treatise de Fide Trinitatis, commentaries on the Bible, &c. The complete works of Alcuin have been edited by Froben: Alcuini opera, 1 vol. in 4 parts (Regensburg, 1777); this edition is reproduced in Migne's Patrolog. lat. vols. c. and ci. The letters have been published by Jaffe and Dummler in Jaffe's Bibliotheca rerum germonicarum, vol. vi. pp. 132-897 (1873). E. Dummler has also published an authoritative edition, Epistolae aevi Carolini, vol. ii. pp. 1-481, in the Monumenta Germaniae, and has edited the poems in the same collection: Poetae latini aevi Carolini, vol. i. pp. 169-341.

AUTHORITIES.--Monnier, Alcuin et Charlemagne (Paris, 1863); K. Werner, Alkuin und sein Jahrhundert (Paderborn, 1876); J. Bass Mullinger, The Schools of Charles the Great and the Restoration of Education in the 9th Century (London, 1877); Aug. Molinier, Les Sources de l'histoire de France, vol. i. p. 191; G, Monod, Etudes critiques sur les sources de l'histoire carolingienne, part i. (Paris, (1898); C. J. B. Gaskoin, Alcuin: His Life and his Work (London, 1903). See further U. Chevalier, Repertoire des sources, &c., biobibliographie, s.v. Alcuin; Wattenbach, Deutschlands Geschichtsquellen (Stuttgart and Berlin, 1904), i, p. 186. (C. PF.)

ALCYONE, or HALCYONE, in Greek mythology, daughter of Aeolus and wife of Ceyx. For their presumption in calling themselves Zeus and Hera they were changed into birds--Alcyone into a diver, Ceyx into a kingfisher. According to another story, Ceyx was drowned and his body cast on the shore. His wife found the body, and the gods, out of compassion, changed both her and her husband into kingfishers. By command of Zeus (or Aeolus) the winds ceased to blow during their brooding-time, for seven days before and after the shortest day, that their eggs might not be carried away by the sea. Hence the expression ``halcyon days,'' used in ancient and modern times to denote a period of calm and tranquillity.

Apollonius Rhodius i. 1087; Ovid, Metam. xi. 410 et seq.; Hyginus, Fabulae, 65.

ALDABRA, the collective name of a group of islands in the Indian Ocean, forming part of the British colony of Seychelles. They lie in 9 deg. 30' S., 46 deg. E., are 265 m. N.W. of the northern point of Madagascar and 690 m. S.W. of Mahe, the principal island of the Seychelles archipelago. The Comoro Islands lie 220 m. S. by W. of Aldabra. The Aldabra Islands constitute an atoll consisting of an oval ring of land, some 40 m. in circumference and about 1 1/2 m. broad, enclosing a shallow lagoon. Channels divide the ring into four islands. Grande Terre or South Island forms three-fifths of the circumference. The other islands are West Island or Ile Picard, Polymnie and Middle Island. There are in addition several islets in the lagoon, the most important being Ile Michel. The total land area is estimated at about 60 sq. m., the lagoon, 16 m. long and 4 m. wide, covering a somewhat larger area. Pop. (1906) 127. The islands rise from 20 to 80 ft. above the sea, and consist of rugged coral rock and limestone, there being very little soil. The sea-face is generally overhanging cliff, but in a few places are sandy beaches and low sandhills. Dense scrub covers most of the land, but the inner (lagoon) shore is everywhere bounded by mangrove swamps. The flora and fauna of the islands present features of unusual interest. They are chiefly noted as the habitat of the gigantic land tortoise (Testudo elephantina), now carefully preserved, and of several rare and peculiar birds, including a rail (Dryolimnas aldabranus), an ibis (Ibis abbottii) and a dove (Alectroenas sganzini.) Crustacea are abundant. They include oysters, crabs of great size, and a small mussel, found in enormous numbers. The flora includes mangroves, Rubiaceae, Sapotaceae and other forms requiring more than pure coralline material for their growth. Writing of the fauna and flora generally, Mr R. Dupont, curator of the Botanic station at Mahe, who visited Aldabra in 1906. says: ``The specimens represented, besides being partly peculiar, mostly belong to the Mascarenes, Madagascar and Comoros species. Many species are also common to East Africa and to India. . . . The predominant species are Madagascar plants and birds, which are carried by the currents and the winds. . . . There are comparatively few (10) species of plants which are endemic as far as the flora has been investigated, and it is probable that most of them are also existing in the Comoros, where the flora is not well known. . . . Endemic inferior animals and mammals are practically non-existent, except two bats and one scorpion, which are allied to Madagascar species or introduced. The reptiles (tortoises) are also nearly allied to the Mascarenes and Madagascar species which once existed. With regard to birds and land shells the relation is much closer to the Comoros species, and the latter, of which I have collected seven species besides Rachis aldabrae, may serve to point out more than the birds the land connexion of Aldabra with the neighbouring countries.'' Aldabra, however, although situated in that region of the Indian Ocean which forms part of the site of the Indo-Madagascar continent of the Secondary period, is not a peak of the submerged land. It has been built up from the sunken remains of the old continent by a deposit, in the opinion of Professor A. Voeltzkow, of foraminiferal remains (mostly coccoliths and rhabdoliths). In any case, however Aldabra was formed, there can be no suggestion of its ever having been joined to any other land (Stanley Gardiner). Dupont states that at Aldabra the coral foundation is totally above water. The coral limestone of the atoll has a peculiar vitrified appearance and gives out a ringing sound when struck or simply walked on. The coral is generally reddish, but the colouring ranges from light yellow to chocolate-brown.

Aldabra was visited by Portuguese navigators in 1511. The islands were already known to the Arabs, from whom they get their name. They became in the middle of the 18th century dependencies of the French establishments at Bourbon (Reunion), whence expeditions were made for the capture of the giant tortoises. In 1810 with Mauritius, Bourbon, the Seychelles and other islands, Aldabra passed into the possession of Great Britain. The inhabitants are emigrants from the Seychelles. Goats are bred and coco-nuts cultivated, but fishing is the chief industry. With other outlying islands Aldabra is held under lease from the Seychelles government, the lessees having exclusive trading privileges.

See R. Dupont, Report on a Visit of Investigation to . . . the Aldabra Group of the Seychelles Islands (Seychelles, 1907); Dr Abbott in Proceedings, United States National Museum (Washington, 1894); A. Voeltzkow in Abh. der Senckenbergischen Naturferschenden Ges. vol. xxvi. part iv. (1901); J. S. Gardiner, ``The Indian Ocean,'' Geo. Journ. Oct. 1906.

ALDBOROUGH, a village in the Ripon parliamentary division of the West Riding of Yorkshire, England, 16 m. W.N.W. of York, and 1 m. E. of the market town of Boroughbridge, which has a station on a branch of the North-Eastern railway. Aldborough formerly returned two members to parliament, but was disfranchised by the Reform Act of 1832. The place is remarkable from its numerous ancient remains. It was the Isurium Brigantum of the Romans, originally perhaps a capital of the Brigantes tribe, and afterwards a Romano-British town of considerable size. Inscriptions, beautiful mosaics and other traces of comfortable houses have been found, with many potsherds, coins and bronze, iron and other objects; and a large part of the town walls, several mosaics and parts of buildings, can be seen. A fine collection is kept in the Museum Isurianum in the grounds of the manor-house.

ALDEBURGH [ALDBOROUGH], a market town and municipal borough in the Eye parliamentary division of Suffolk, England, the terminus of a branch of the Great Eastern railway, 99 1/2 m. N.E. by E. from London. Area, 1629 acres. Pop. (1901) 2405. The surrounding district is open and somewhat bleak, but a fine stretch of sand fringes the shallow inlet of the North Sea known as Aldeburgh Bay. To the W. the river Alde broadens as if into an estuary, but its outflow is here prevented by the sand, and it runs south for nearly 10 m. parallel with the shore. The sandbanks have arrested the encroachments of the sea, which submerged a former site of Aldeburgh. The church of St Peter and St Paul is Perpendicular, largely restored, and contains a monument to the poet George Crabbe, born here on the 24th of December 1754. A small picturesque Moot Hall of the 16th century is used for corporation meetings. Slaughden Quay on the Alde admits small vessels, and fishing is carried on. Aldeburgh is governed by a mayor, 4 aldermen and 12 councillors.

Aldeburgh (Aldburc) takes its name from the river Alde on which it stands. It is not mentioned in pre-Conquest records, but at the Domesday survey most of the land was held by Robert Malet, a Norman. In 1155 the manor was granted to the abbey of St John of Colchester, later to Cardinal Wolsey, and on his disgrace, to Thomas Howard, duke of Norfolk, to whom Elizabeth in 1567 granted a market on Saturday. In the 16th century Aldeburgh was a place of considerable commercial importance, due, no doubt, to its position on the sea-coast. Aldeburgh claims to be a borough by prescription: the earliest charter is that granted by Henry VIII. in 1529. Edward VI. in 1548 raised it to the rank of a free borough, granting a charter of incorporation and a market on Wednesday. Later charters were granted by Philip and Mary in 1553, by Elizabeth in 1558 and 1567, by James I. (who granted two annual fairs) in 1606, and by Charles I. in 1631 and 1637. The corporation included 2 bailiffs, 10 capital and 24 inferior burgesses, until the Municipal Corporations Act 1883. The fairs and markets became so unimportant that they were discontinued about the middle of the 19th century. The town returned two members to Elizabeth's parliament of 1572, and continued to be so represented till the Reform Bill of 1832 disfranchised it. Frequent disastrous incursions of the sea in the 18th century reduced Aldeburgh to a mere fishing village. In recent years it has grown as a seaside resort, with excellent golf-links.

See John Kirby, The Suffolk Traveller (2nd ed., 1764); N. F. Hele, Notes about Aldeburgh (1870); Victoria County History--Suffolk.

ALDEGREVER, or ALDEGRAF, HEINRICH (1502-1558), German painter and engraver, was born at Paderborn, from which he removed in early life to Soest, where he died. From the close resemblance of his style to that of Albrecht Durer he has sometimes been called the Albert of Westphalia. His numerous engravings, chiefly from his own designs, are delicate and minute, though somewhat hard in style, and entitle him to a place in the front rank of the so-called ``Little Masters.'' There is a good collection in the British Museum. Specimens of his painting are exceedingly rare. Five pictures are in continental galleries, but the genuineness of the works in the Vienna and Munich collections attributed to him is at least doubtful, the only unchallenged example being a portrait of Engelbert Therlaen (1551) in the Berlin Museum.

ALDEHYDES, a class of chemical compounds of the general formula R.CHO (R = an alkyl or an aryl group). The name is derived from alcohol dehydrogenatum in allusion to the fact that they may be prepared by the oxidation of alcohols. The lower members of the series are neutral liquids possessing a characteristic smell; they are soluble in water and are readily volatile (formaldehyde, however, is a gas at ordinary temperatures). As the carbon content of the molecule increases, they become less soluble in water, and their smell becomes less marked with the increase in boiling point, the highest members of the series being odourless solids, which can only be distilled without decomposition in vacuo.

The aldehydes may be prepared by the careful oxidation of primary alcohols with a mixture of potassium dichromate and sulphuric acid,--3R.CH2OH + K2 Cr2O7 + 4H2SO4 = K2SO4 + Cr2(SO4)3 + 7H2O + 3R.CHO; by distilling the calcium salts of the fatty acids with calcium formate; and by hydrolysis of the acetals. L. Bouveault (Bull. soc. chim., 1904 [3], 31, p. 1306) prepares aldehydes by the gradual addition of disubstituted formamides (dissolved in anhydrous ether) to magnesium alkyl haloids, the best yields being obtained by the use of diethyl formamide. Secondary reactions take place at the same time, yielding more particularly hydrocarbons of the paraffin series. G. Darzens (Comptes Rendus, 1904, 139, p. 1214) prepares esters of disubstituted glycidic acids, by condensing the corresponding ketone with monochloracetic ester, in the presence of sodium ethylate. These esters on hydrolysis yield the free acids, which readily decompose, with loss of carbon dioxide and formation of an aldehyde,

/R /CRR1 /CRR1
OC< + Cl.CH2.COOC2H5 --> O< | --> O< |
\R1 \CH.COOC2H5 \CH.COOH

--> CO2 + CHRR1.CHO.

In the German Patent 157573 (1904) it is shown that by the action of at least two molecular proportions of an alkyl formate on two molecular proportions of a magnesium alkyl or aryl haloid, a complex addition compound is formed, which readily decomposes into a basic magnesium salt and an aldehyde,

C6H5MgBr + HCOOR --> RO.CH.C6H5.OMgBr --> MgBr.OR + C6H5CHO.

The aldehydes are characterized by their great chemical reactivity. They act as reducing agents, silver nitrate in the presence of ammonia being rapidly reduced to the condition of metallic silver. They are easily oxidized to the corresponding fatty acid, in many cases simply by exposure to air. Nascent hydrogen reduces them to primary alcohols, and phosphorus pentachloride replaces the carbonyl oxygen by chlorine. They form many addition compounds, combining with ammonia to form aldehyde ammonias of the type R.CH(OH).NH2. These are colourless crystalline compounds, which are most readily prepared by passing ammonia gas into an ethereal solution of the aldehyde. With sodium bisulphite they form the so-called bisulphite compounds R.CH(OH).SO3Na, which are readily resolved into their components by distillation with dilute acids, and are frequently used for the preparation of the pure aldehyde.

With hydrocyanic acid aldehydes form the cyanhydrins R.CH(OH).CN. They react with hydroxylamine and phenylhydrazine, with the formation of aldoximes and hydrazones. (For the isomerism of the aldoximes see OXIMES.) The hydrazones are crystalline substances which are of value in the characterization of the aldehydes. Both oximes and hydrazones, on boiling with dilute acid, regenerate the parent aldehyde. The hydrazones are best prepared by mixing the aldehyde with phenylhydrazine in dilute acetic acid solution, in the absence of any free mineral acid. Semioxamazid, NH2.CO.CO.NH.NH2, has also been employed for the identification of aldehydes (W. Kerp and K. Unger, Berichte, 1897, 30. p. 585). Aldehydes are converted into resins by the action of caustic alkalies. On heating with alcohols to 100 deg. C. they form acetals, and they also form condensation products with para-amido-di-methyl-aniline (A. Calm, Berichte, 1884, 17, p. 2939). They react with the zinc alkyls to form addition products, which are decomposed by water with formation of secondary alcohols (K. Thurnlach, Annalen, 1882, 213, p. 369) thus:-- Zn(C2H5)2 H2O /C2H5 /C2H5 CH3.CHO --> CH3.CH< --> CH3.CH< + ZnO + C2H6. \OZnC2H5 \OH The reaction is a general one for all aldehydes with zinc methyl and zinc ethyl, but not with the higher zinc alkyls. V. Grignard (Comptes Rendus, 1900 et seq.) showed that aldehydes combine with magnesium alkyl iodides (in absolute ether solution) to form addition products, which are decomposed by water with the formation of secondary alcohols, thus from acetaldehyde and magnesium methyl iodide, isopropyl alcohol is obtained.

H2O /CH3 CH3.CHO + CH3MgI --> CH3.CH< --> (CH3)2CH.OH + MgI.OH. \OMgI The lower members of the aliphatic series are characterized by their power of polymerization (see FORMALIN, and the account of Acetaldehyde below), and also by the so-called ``aldol'' condensation, acetaldehyde in this way forming aldol, CH3.CHOH.CH2.CHO. These aldols generally lose the elements of water readily and pass into unsaturated compounds; aldol itself on distillation at ordinary atmospheric pressure gives crotonaldehyde, CH3.CH:CH.CHO.

Aldehydes are characterized by the reddish-violet colour which they give with a solution of fuchsine that has been decolorized by sulphurous acid (H. Schiff, Ann., 1866, 140, p. 131). With diazobenzene sulphonic acid in the presence of alkali and a trace of sodium amalgam, a reddish-violet coloration is formed on standing (E. Fischer, Ber., 1883, 16, p. 657). A. Angeli (Gazz. chim. Ital., 1896, 22, ii. 17) has shown that aldehydes in the presence of nitrohydroxylaminic acid form hydroxamic acid. The aldehydes condense readily with acetoacetic ester in the presence of ammonia, to pyridines (see PYRIDINE), whilst O. Doebner and W. v. Miller (Ber., 1892, 25, p. 2864; 1896, 29, p. 59) have shown that in the presence of aniline and sulphuric acid they give substituted quinolines. (See also C. Beyer, Ber., 1887, 20, p. 1908). The chief aldehydes are shown in the following table:--

_____________________________________________________________________________ | Name. | Formula | Boiling | Melting| | | | Point. | Point.| |--------------------|-----------------------------------|---------|--------| | Formaldehyde | H.CHO |-21 deg. | | | Acetaldehyde | CH3.CHO | 20.8 deg. | | | Propyl aldehyde | CH3.CH2.CHO | 49 deg. | | | n-Butyl '' | CH3.(CH2)2.CHO | 75 deg. | | | iso- '' '' | (CH3)2.CH.CHO | 61 deg. | | | n-Valeryl '' | CH3.(CH2)3.CHO |103 deg. | | | iso- '' '' | (C4H9.CHO | 92 deg. | | | Oenanthyl '' | CH3.(CH2)5.CHO |155 deg. | | | Capric '' | CH3.(CH2)8.CHO |121 deg. | | | Lauric '' | CH3.(CH2)10.CHO | |44.5 deg. | | Myristic '' | CH3.(CH2)12.CHO | |52.5 deg. | | Palmitic '' | CH3.(CH2)14.CHO | |58.5 deg. | | Stearic '' | CH3.(CH2)16.CHO | |63.5 deg. | |--------------------|-----------------------------------|---------|--------| | Acrolein | | | | | ally aldehyde | CH2 : CH.CHO | 52 deg. | | | Crotonic '' | CH3.CH : CH.CHO |104 deg. | | | Tiglic '' | | | | | (guaiacol) | CH3.CH : C.CH3.CHO |116 deg. | | |--------------------|-----------------------------------|---------|--------| | Proargylic A. | CH : C.CHO | 59 deg. | | |--------------------|-----------------------------------|---------|--------| | Benzaldehyde | C6H5.CHO |179 deg. | | | {o | |200 deg. | | | Toluicaldehyde{m | C6H4.CH3.CHO |199 deg. | | | {p | |204 deg. | | | Cumic '' | C6H4.C3H7.CHO |235 deg. | | | Cinnamic '' | C6H5.CH : CH.CHO |247 deg. | | |____________________|___________________________________|_________|________|

For formaldehyde see FORMALIN. Acetaldehyde, CH3.CHO, was first noticed by C. Scheele in 1774 and isolated and investigated by J. v. Liebig (Annalen, 1835, 14, p. 133). It is prepared by oxidizing ethyl alcohol with dilute sulphuric acid and potassium bichromate, and is a colourless liquid of boiling point 20.8 deg. C., possessing a peculiar characteristic smell. Its specific gravity is 0.8009 (0 deg. C.). It is miscible in all proportions with alcohol, ether and water. It is readily polymerized, small quantities of hydrochloric acid, zinc chloride, carbonyl chloride, &c. converting it, at ordinary temperatures, into paraldehyde, (C2H4O)3, a liquid boiling at 124 deg. C. and of specific gravity 0.998 (15 deg. C.). Paraldehyde is moderately soluble in water, and when distilled with sulphuric acid is reconverted into the ordinary form. Metaldehyde, (C2H4O)3, is produced in a similar way to paraldehyde, but at lower temperatures (e.g. in presence of a freezing mixture). It is a crystalline solid, which sublimes at 112 deg. -115 deg. C. It is insoluble in water, and is only slightly soluble in alcohol and ether. When heated in a sealed tube at 120 deg. C. it is completely converted into the ordinary form. Paraldehyde is oxidized by dilute nitric acid, with formation of much glyoxal, (CHO)2. (For trichloracetaldehyde see CHLORAL.)

By the action of acetaldehyde on alcohol at 100 deg. C., acetal, CH3.CH(OC2H5)2, is produced. It may also be prepared by oxidizing ethyl alcohol with manganese dioxide and sulphuric acid (A. Wurtz). It is a colourless liquid of specific gravity 0.8314 (20 deg. /4 deg. ) (J. W. Bruhl) and boiling point 104 deg. C. Dilute acids readily transform it into alcohol and aldehyde, and chromic acid oxidizes it to acetic acid. Chlor- and brom-acetals have been described.

Thioaldehydes are also known, and are obtained by leading sulphuretted hydrogen into an aqueous solution of acetaldehyde. By this means a mixture is obtained which by distillation or the action of hydrochloric acid yields trithioaldehyde, (C2H4S)3. For the constitution of these substances see E. Baumann and E. Fromm (Berichte, 1891, 24, p. 1426). Aldehyde ammonia, CH3.CH(OH).NH2, is formed when dry ammonia gas is passed into an ethereal solution of acetaldehyde. It crystallizes in glistening rhombohedra, melting at 70 deg. -80 deg. C., and boiling at 100 deg. C. It is completely resolved into its components when warmed with dilute acids.