Himalayan Journals, vol 2, J. D. Hooker [small books to read txt] 📗

Tem. Act.

Hour Act. Act. Reduced Barom. Air

a.m. 7.34 to 7.41 10.0 69.4 8.4200 29.948 55.4

8.38 to 8.45 16.0 70.0 13.3920 58.9 9.44 to 9.51 19.5 74.7 15.3660 29.891 63.2 10.46 to 10.53 21.0 78.2 15.8550 66.7 11.50 to 11.57 21.5 81.2 15.6950 69.8

p.m. 0.06 to 0.13 24.1 88.0 16.4603 29.850 70.3

0.58 to 1.02 23.9 87.2 16.4432 71.0 1.45 to 1.52 21.4 84.5 15.0870 71.3 3.15 to 3.22 18.1 82.5 13.0320 29.798 71.3 4.27 to 4.34 10.2 82.0 7.3746 70.0 4.36 to 4.43 9.8 84.0 6.9482 4.45 to 4.52 8.5 85.0 5.9670 4.56 to 5.09 5.6 85.0 3.9312 67.5 5.12 to 5.18 3.8 84.0 2.6942 29.778 68.7 Black

Hour D.P. Diff. Sat. Bulb

a.m. 7.34 to 7.41 54.0 1.4 .953 Mist rises and

8.38 to 8.45 57.7 1.2 .970 104.5 drifts westward 9.44 to 9.51 61.7 1.5 .960 115.0 till 7.30 a.m. 10.46 to 10.53 62.4 4.3 .870 129.0 11.50 to 11.57 58.3 11.5 .688 117.0 Wind N.W., clouds

p.m. 0.06 to 0.13 56.0 14.3 .625 122.5 rise.

0.58 to 1.02 56.7 14.3 .625 1.45 to 1.52 57.5 13.8 .633 117.0 3.15 to 3.22 57.1 14.2 .625 4.27 to 4.34 59.5 10.5 .708 4.36 to 4.43 4.45 to 4.52 4.56 to 5.09 62.7 4.8 .855 Sunset cloudless. 5.12 to 5.18 62.2 6.5 .810

C.--JANUARY 2, 1851.

Watch slow 3 minutes mean time.

Tem. Act.

Hour Act. Act. Reduced Barom. Air

a.m. 10.02 to 10.09 19.2 71.0 15.8592 64.5

10.20 to 10.24 22.6 79.0 16.9048 29.861 65.6

p.m. 0.03 to 0.10 24.7 89.2 16.6972 29.858 69.0

0.22 to 0.25 25.9 95.5 18.6796 70.7 2.04 to 2.08 23.3 91.5 15.4479 71.2 2.10 to 2.14 23.8 93.0 15.6128 Black

Hour D.P. Diff. Sat. Bulb

a.m. 10.02 to 10.09 60.6 3.9 .878 116.0 Low, dense fog at

10.20 to 10.24 61.4 4.2 .872 sunrise, clear at

p.m. 0.03 to 0.10 59.3 9.7 .728 119.0 9 a.m.

0.22 to 0.25 57.5 3.2 .650 Hills hazy and 2.04 to 2.08 61.0 10.2 .718 112.0 horizon grey. 2.10 to 2.14

APPENDIX 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.

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

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