Chapter M

Magillicuddy's Reeks, 27, 150, 151.
Magnet, poles of, 32;
repelling corners and ends of, 126.
Märgelin See, 138; icebergs in the, 138.
Marginal crevasses, explanation of, 106-109.
Mauvais Pas, 41.
Measurements of glaciers by Hugi and Agassiz, 59, 60.
Medial moraines, how accounted for, 55.
Mer de Glace, 41;
its sources, 43-45;
view of the, 44;
branching of the, 45;
medial moraines of the, 51, 52;
triangulation of, 62;
motion of, 66, 70;
daily motion of, 67;
unequal motion of the two sides of, 70-72;
motion of axes of, 78;
summer condition of, 87;
winter on, 88-92;
dirt-bands of, 127;
dimensions of, 145;
winter motion of, 93;
greater number of crevasses on eastern side of, 112;
glacier tables of, 113;
grand moulin of, 117, 118;
approximate weight of, 154.
Molecules, of water, 31, 34;
expansion of, 125;
forces acting upon, 127;
exclusiveness of water, 132, 133.
Montanvert, auberge of the, 41, 43;
appearance in winter, 89.
Moraine, lateral, 41;
medial moraines of the Mer de Glace, 51, 112;
cedars of Lebanon growing on ancient, 150;
explanation of the cause of ridges on, 112, 113.
Morteratsch glacier, cause of the widening of the medial
moraine of, 97;
motion of, 95, 96;
sand-cones of, 116.
Motion, of Mer de Glace, 93;
of Grindelwald, 94;
of Great Aletsch glacier, 94;
of Morteratsch glacier, 95;
sand-cones of, 116.
Moulins, description of, 116;
dangers from, 117;
sounding of, 118.
Mountain condensers, 27, 150.

N

_Névé_, explanation of term, 49;
stratification of the, 179.

O

Obliquity of the lateral crevasses, 167;
illustration, 107, 108.

P

Petit Plateau, 56.
Piz Bernina, route to, 95.
Place de la Concorde of Nature, 136.
Plastic theory, 156;
advocated by Bordier, 157;
advocated by Rendu, 158.
Poles, atomic, 32, 126;
attractive and repellent, 30.
Pontresina, village of, 95.
Precious stones, examples of crystallizing power, 30.
Precipitation, 23, 25;
atmospheric, 27.
Promontory of Trélaporte, 44;
of Tacul, 51.
Proofs of glacier-motions, 58.
Pyramid of Aiguille du Dru, 43;
of Aiguille des Charmoz, 43.

Q

Quotation from Rendu, 158.

R

Rain, its source, 3;
tropical, 23, 25.
Rainfall, observations on amount of, 28.
Regulation, theory, 163-167;
observations made by Mr. Faraday, 164;
formation of chain of icebergs by, 165;
cause of, 167;
Faraday's view of, 171-176.
Relation of structure to pressure, 183;
veined structure described by Guyot, 183-185;
illustration, 186;
connection established, 187.
Retina, how excited, 8;
theory of Sir Isaac Newton, 9.
Riffelberg Hotel, location of, 144.
Rivers, their sources, 1, 7, 19.

S

Sand-cones, 116.
Scientific tacts, connection of, 72.
Siedelhorn, view from the summit of, 146.
Snow, its conversion into ice, 156;
consolidation in Alpine regions, 156;
line, 49;
its formation in Russian ball-rooms, 5;
in subterranean stables, 5, 14;
in polar regions, 21;
its architecture, 29-32, 34, 91;
absorbs solar heat, 100.
Solidifying power of camphor and metals, 17.
Source of the Severn, 2;
the Thames, 2;
the Danube, 2;
the Rhine, 2;
the Rhone, 2;
the Gauges, 2;
the Euphrates, 2;
the Garonne, 2;
the Elbe, 2;
the Missouri, 2;
the Amazon, 2;
Albula, 2;
the Arveiron, 38;
the Aar, 50.
Stalactites of Alpine crevasses, 100.
Steam, its condensation, 3, 4.
Sunbeams, office of, 10-21.
Sun, its heat the source of Alpine ice, 7;
vibratory motion of the atoms of the, 11;
position of, 19;
indirect heat, of the, 28.
Switzerland, ancient glaciers of, 145-147.

T

Theodolite, description of, 63;
use of, 64, 65.
Theory, of Dilatation, 155;
developed by De Charpentier, 156;
sliding, 156;
plastic, 156-160;
viscous, 161-103;
regulation, 163-167;
of glacial epoch, 155-167.
Trade-winds, 20.
Transverse crevasses, formation of, 104, 105.
Trélaporte, promontory of, 44;
motion of the water through the narrows of, 79.

U

Universe, order of the, 32.