In the following tables I have given the elevations of 300 places, chiefly computed from barometric data. For the computations such observations alone were selected as were comparable with contemporaneous ones taken at the Calcutta Observatory, or as could, by interpolation, be reduced to these, with considerable accuracy: the Calcutta temperatures have been assumed as those of the level of the sea, and eighteen feet have been added for the height of the Calcutta Observatory above the sea. I have introduced two standards of comparison where attainable; namely, 1. A few trigonometrical data, chiefly of positions around Dorjiling, measured by Lieutenant-Colonel Waugh, the Surveyor-General, also a few measured by Mr. Muller and myself, in which we can put full confidence: and, 2. A number of elevations in Sikkim and East Nepal, computed by simultaneous barometer observations, taken by Mr. Muller at Dorjiling. As the Dorjiling barometer was in bad repair, I do not place so much confidence in these comparisons as in those with Calcutta. The coincidence, however, between the mean of all the elevations computed by each method is very remarkable; the difference amounting to only thirty feet in ninety-three elevations; the excess being in favour of those worked by Dorjiling. As the Dorjiling observations were generally taken at night, or early in the morning, when the temperature is below the mean of the day, this excess in the resulting elevations would appear to prove, that the temperature correction derived from assuming the Calcutta observations to correspond with eighteen feet above the level of the sea at Sikkim, has not practically given rise to much error.
I have not added the boiling-point observations, which afford a further means of testing the accuracy of the barometric computations; and which will be found in section J of this Appendix.
The elevation of Jillapahar is given as computed by observations taken in different months, and at different hours of the day; from which there will be seen, that owing to the low temperature of sunrise in the one case, and of January and October in the others, the result for these times is always lowest.
Moat of the computations have been made by means of Oltmann's tables, as drawn up by Lieutenant-Colonel Boileau, and printed at the Magnetic Observatory, Simla; very many were worked also by Bessell's tables in Taylor's "Scientific Memoirs," which, however, I found to give rather too high a result on the averages; and I have therefore rejected most of them, except in cases of great elevation and of remarkable humidity or dryness, when the mean saturation point is an element that should not be disregarded in the computation. To these the letter B is prefixed. By far the majority of these elevations are not capable of verification within a few feet; many of them being of villages, which occupy several hundred feet of a hill slope: in such cases the introduction of the refinement of the humidity correction was not worth the while.
SERIES I.—Elevations on the Grand Trunk-road. February, 1848.
No. of Elevation
Obs. Name of Locality Feet
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1 Burdwan 93
2 Gyra 630
3 Fitcoree 860
2 Tofe Choney 912
4 Maddaobund 1230
1 Paras-nath saddle B.4231
2 ,, cast peak 4215
1 ,, flagstaff 4428
1 ,, lower limit of Clematis and Berberis 3162
1 Doomree 996
1 Highest point on grand trunk-road 1446
4 Belcuppee 1219
1 Hill 236th mile-stone 1361
3 Burree 1169
1 Hill 243rd mile-stone 1339
3 Chorparun 1322
3 Dunwah 625
1 Bahra 479
1 284th mile-stone 474
2 Sheergotty 460
4 Muddunpore 402
1 312th mile-stone 365
3 Naurungabad 337
4 Baroon (on Soane) 344
4 Dearse 332
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SERIES II.—Elevations in the Soane Valley. March, 1848.
No. of Elevation
Obs. Name of Locality Feet
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3 Tilotho 395
6 Akbarpore 403
2 Rotas palace 1489
4 Tura 453
3 Soane-pore 462
6 Kosdera 445
4 Panchadurma 492
1 Bed of Soane above Panchadurma 482
3 Pepura 587
1 Bed of Soane river 400
9 Chahuchee 490
4 Hirrah 531
4 Kotah 541
4 Kunch 561
7 Sulkun 684
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SERIES III.—Elevations on the Kymore Hills. March, 1848.
No. of Elevation
Obs. Name of Locality Feet
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2 Roump 1090
9 Shahgunj 1102
1 Amoee 818
1 Goorawul 905
9 Mirzapore (on the Ganges) 362
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