| Hour | Act. | Temp. Act. | Act. reduced | Barom. | Air | D.P. | Diff. | Sat. | Black Bulb | |
| 10.02 to 10.09 10.20 to 10.24 12.03 to 12.10 p.m. 12.22 to 12.25 p.m. 2.04 to 2.08 p.m. 2.10 to 2.14 p.m. | 19·2 22·6 24·7 25·9 23·3 23·8 | 71·0 79·0 89·2 95·5 91·5 93·0 | 15·8592 16·9048 16·6972 18·6796 15·4479 15·6128 | 29·861 29·858 | 64·5 65·6 69·0 70·7 71·2 | 60·6 61·4 59·3 57·5 61·0 | 3·9 4·2 9·7 3·2 10·2 | ·878 ·872 ·728 ·650 ·718 | 116·0 119·0 112·0 | Low, dense fog at sunrise, clear at 9 a.m. Hills hazy and horizon grey. |
L.
TABLE OF ELEVATIONS.
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.
Most 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 Obs. | Name of Locality | Elevation Feet |
|
1 2 3 2 4 1 2 1 1 1 1 4 1 3 1 3 3 1 1 2 4 1 3 4 4 |
Burdwan Gyra Fitcoree Tofe Choney Maddaobung Paras-nath saddle Paras-nath cast peak Paras-nath flagstaff Paras-nath lower limit of Clematis and Berberis Doomree Highest point on grand trunk-road Belcuppee Hill 236th mile-stone Burree Hill 243rd mile-stone Chorparun Dunwah Bahra 284th mile-stone Sheergotty Muddunpore 312th mile-stone Naurungabad Baroon (on Soane) Dearee (on Soane) |
93 630 860 912 1230 B.4231 4215 4428 3162 996 1446 1219 1361 1169 1339 1322 625 479 474 460 402 365 337 344 332 |
SERIES II.—Elevations in the Soane Valley. March, 1848.
| No. of Obs. | Name of Locality | Elevation Feet |
|
3 6 2 4 3 6 4 1 3 1 9 4 4 4 7 |
Tilotho Akbarpore Rotas palace Tura Soane-pore Kosdera Panchadurma Bed of Soane above Panchadurma Pepura Bed of Soane river Chahnchee Hirrah Kotah Kunch Sulkun |
395 403 1489 453 462 445 492 482 587 400 499 531 541 561 684 |