Chapter XVIII: Appendix: VII

* * * * *

HYPSOMETRICAL TABLE OF STATIONS BETWEEN VICTORIA BAY AND CAMAROONS
MOUNTAINS.

M. MANN’S instrument is a B. P. (Fah.) by Negretti and Zambra (no number). At sea-level, before starting, his readings were:—

212° ·4 }
}
„ ·5 }
}
„ ·4 } Temperature 77° (Fah.).
}
„ ·3 }
}
„ ·3 }

The mean was assumed at 212°·4.

In the evening a series of five readings gave a mean of 212°·3. Temp. 88°·50 (Fah.).

On return to Victoria Bay (Feb. 23rd) five readings gave a mean of 212°·1. Temp. 82°·50 (Fah.).

The medium of M. Mann’s instrument was therefore assumed at 212° + ·3. The observations were corrected accordingly, and have been marked (M).

Mr. Saker had a French aneroid. I, one by Messrs. Cary, Strand, London, an expensive and most carelessly made article, whose hand could not even be screwed round for correction.

My B. P. was the zeometer, a new hypsometric apparatus made by Messrs. Casella, of 23 Hatton Garden, London. It answered tolerably, but, as has appeared, the cup was injured during the descent of the mountain on the 27th Dec. 1861, after which the glass tube was used in the ordinary way. Its observations are marked (B).

The average temperature has been assumed at 78°·5, and the calculations have been made by Mr. George, of the Royal Geographical Society.

OBSERVATIONS.

-------+---------------------------+---------------------+------------
Date. | Station. | Observation. | Altitude.
-------+---------------------------+---------------------+------------
1861 | | |
| | |
Dec. 14|Bosumbo | 210°·1 (M). Temp. |1055 feet.
| |71°. Mean of two Obs.|
| | |
Dec. 19|Bosumbo |29°·6 Aneroid. Temp. |
| | 78°. |
| | |
Dec. 15|Mapanya |28°·2 Aneroid. Temp. |
| | 79°. |
| | |
Dec. 15|Mapanya | 207°·3 (M). Temp. |2610 „
| | 66°. Morn. |
| | |
Dec. 15|Mapanya | 207°·2 (M). Temp. |2683 „
| | 73°. Even. |
| | |
Dec. 21|Ridge Camp |27°·2 Aneroid. Temp. |
| | 68°. |
| | |
1862 | | |
| | |
Feb. 1 |Fern Gate |204° (B). Temp. 80°. |4535 „
| | |
1861 | | |
| | |
Dec. 23|Black Crater |199° (M). Temp. 63°. |7328 „
| | |
Dec. 24|Mann’s Spring | 198°·7 (M). Temp. |7466 „
| | 58°. |
| | |
Dec. 24|Mann’s Spring | 199°·2 (M). Temp. |7221 „
| | 63°. |
| | |
Dec. 25|Mann’s Spring |200° (B). Temp. 65°. |6762 „
| | |
1862 | | |
| | |
Jan. 27|Foot of Mount Helen |198° (B). Temp. 66°. |7932 „
| | |
1861 | | |
| | |
Dec. 24|Top of Mount Helen | 195°·7 (M). Mean |9223 „
| | of five Obs. Temp. |
| | 58°·50. |
| | |
Dec. 24|Top of Mount Helen | 195°·4 (B). Temp. |9383 „
| | 57°. |
| | |
Dec. 27|Below Earthwork Crater | 24°·15 Aneroid. |Not worth
| | |calculating.
| | |
Dec. 27|Above Earthwork Crater . | 23°·850 Aneroid. |Ditto.
| | |
1862 | | |
| | |
Jan. 28|Crater of Mount Isabel | 193°·9 (M). Mean of |10,187 „
| |five Read. Temp. 50°.|
| | |
Jan. 28|Summit of Mount Isabel | 193°·4 (B). Temp. |10,590 „
| | 60°. |
| | |
Jan. 28|Camp Saker |193° (B). Temp. 48°. |10,595 „
| | |
Jan. 28|Foot of Victoria Mountain | 193°·5 (B). Temp. |10,530 „
| | 60°. |
| | |
Jan. 30|Foot of Mount Hooker | 192°·7 (M). Temp. |10,875 „
| | 48°. |
| | |
Jan. 30|Summit of Mount Hooker | 191°·2 (M). Temp. |11,725 „
| | 45°. |
| | |
Jan. 14|Victoria Crater |188°. Temp. 58° Obs. |13,806 „
| | by Mr. Saker. |
| | |
Jan. 30|Summit of Victoria Mountain| 189°·7 (B). Temp. |12,696 „
| | 51°. |
| | |
Jan. 29|Summit of Albert Crater | 189°·5 (B). Temp. |12,948 „
| | 62°. |
| | |
Jan. 29|Highest Point of Albert | 189°·2 (B). Temp. |13,129 „
|Mountain | 62°. |
-------+---------------------------+---------------------+------------

In assuming 78°·50 (Fah.) as the mean temperature at sea-level, I have been obliged, for want of other comparison, to adopt the mean of M. Mann’s observations.

Before leaving Victoria Bay, he made, between the 6th and 12th of December, 1861, a series of thirteen maximum and minimum observations, whose mean is 79°.

After returning to Victoria Bay, he made five maximum and six minimum observations between the 19th and the 24th February, and their mean is 78°.

My friend Major Noeli, of the Spanish artillery, supplied me at Fernando Po with the following table. It will be seen that the mean of December, January, and February, 1859-60, are also 78°·50 (Fah.).

OBSERVATIONS OF TEMPERATURE BY MAJOR NOELI, H.C.M.’S ARMY, AT FERNANDO
PO, 1859-1860.

Observations taken at 6 a.m., 8 a.m., 10 a.m., noon when possible, 3
p.m., 10 p.m.

Place:—Room facing N.E., and about 100 feet above sea-level.

----------+-----------------+----------+------------------------------
| Thermometer. |Barometer.|
Date. +----+-----+------+----------+ Remarks.
|Max.|Min. |Mean. | Mean. |
----------+----+-----+------+----------+------------------------------
Sep. 1859.|81·0|69·0 |75·44 | 29·66 |Only taken during last half
| | | | |month. Twelve days’ heavy
| | | | |rain. Frequent fresh breezes
| | | | |when there was no rain.
| | | | |
Oct. „ |83·5|70·0 |76·40 | 29·65 |Nine days’ rain. Sea-breezes
| | | | |when no rain.
| | | | |
Nov. „ |85·0|70·0 |78·05 | 29·61 |Sixteen days’ rain (less
| | | | |copious and shorter), chiefly
| | | | |in early morn. Five mild
| | | | |tornados. Frequent breezes.
| | | | |
Dec. „ |86·0|69·0 |78·90 | 29·59 |9 A.M. 26th. Tornado and
| | | | |rain. Another rainy day, fine
| | | | |drops. Frequent breezes.
| | | | |
Jan. 1860.|86·5|67·5 |77·87 | 29·59 |One rainy day. Frequent
| | | | |breezes. Harmattan. Great
| | | | |heat on calm days.
| | | | |
Feb. „ |88·0|69·0 |78·73 | 29·54 |One day’s rain. Various
| | | | |tornados. Sometimes no
| | | | |sea-breeze till 3 P.M. Great
| | | | |heat. Therm. 88° only one day.
----------+----+-----+------+----------+
Mean of 6 |85° |69°·1|77°·56| 29·612 |
months. | | | | |
----------+----+-----+------+----------+------------------------------

At Fernando Po the barometric wave is at its highest at 9·10 a.m. and
9·10 p.m., and at its lowest at 3·4 a.m. and 3·4 p.m.

THE END.

LONDON. PRINTED BY W. CLOWES AND SONS, STAMFORD STREET
AND CHARING CROSS.

Transcriber's note:

Page v, in Contents changed: "[Appendix] V." to: "IV.", and inserted
"V. REPORTS AND LETTERS TOUCHING AMBAS BAY — 286"

Page 38, Changed: "to Dr. Baikei’s Niger expedition" to: "Baikie’s"

Page 46, Changed: "supplies from the mainand" to: "mainland"

Page 77, Changed: "_Mormida lucida Benthami_" to: "_Morinda_"

Page 82, Changed: "attire of the Fernadian Bube" to: "Fernandian"

Page 83, Changed: "a form now well-nigh obselete" to: "obsolete"

Page 89, Changed: "were ascepiadæ, gardeniaceæ" to: "asclepiadæ"

Page 139, Changed: "along a crater brenched on the S.E. side" to:
"breached"

Page 239, Changed: "it was usless for me to speak" to: "useless"

Page 257, Changed: "a rule or law, called Diburnbe" to: "Dibumbe"

Page 270, Changed: "Sagnia Abyssinica, Hochst." to: "Sagina"

Page 271, Changed: "Senicula Europæa, L." to: "Sanicula"

Page 272, Changed: "[Lactuca] glanduligera, n. sp." to: "glandulifera"

Page 272, Changed: "Anisoraniphus hyperhæroides" to: "Anisoramphus
hypochæroides"

Page 275, Changed: "[Carex] Echnochlœ, Kunth." to: "Echinochlœ"

Page 277, Changed: "Selagenella" to: "Selaginella"