Himalayan Journals, vol 2 by J. D. Hooker (android pdf ebook reader TXT) π
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8 Nov. & Dec. ... 2 p.m. 60.0 48.3 11.7 .355
6 1848 ... 6 p.m. 50.6 44.7 5.9 .311
9 December, ... 2 p.m. 49.7 41.7 8.0 .280
19 1848 ... 6 p.m. 44.0 40.5 3.5 .269
46 ... ... Mean 49.9 43.3 6.7 .298
CALCUTTANo. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
4 The Dale,* 6952 ft. 6 a.m. 67.9 64.7 3.2 .610
8 Nov. & Dec. ... 2 p.m. 83.3 65.2 18.1 .621
6 1848 ... 6 p.m. 77.3 63.1 14.2 .579
9 December, ... 2 p.m. 79.3 59.0 20.3 .505
19 1848 ... 6 p.m. 75.8 62.6 13.2 .569
46 ... ... Mean 76.7 62.9 13.8 .577
Dorjiling.--Humidity 0.798 Calcutta 0.640
,, Weight of vapour 3.40 gr. ,, 6.27 gr.Comparison of Dorjiling and Calutta.
HUMIDITY
No. of Diff.
Obs. Month Dorjiling Calcutta Dorjiling
102 January -.795 .571 +.224
97 February .828 .590 +.238
40 March .940 -.438 +.502
23 April .684 .523 +.161
48 May .926 .698 +.228
40 June .895 .800 +.095
176 July .929 .800 +.129
167 August +.955 +.818 +.136
185 September .932 .760 +.172
74 October .950 .658 +.292
46 Nov. and Dec. .798 .640 +.158
998 Mean 0.876 0.663 +.212
WEIGHT OF VAPOUR IN CUBIC FOOT OF AIR
No. of Diff.
Obs. Month Dorjiling Calcutta Calcutta
102 January -2.68 -4.80 +2.12
97 February 2.75 5.40 +2.65
40 March 3.42 5.72 +2.30
23 April 3.98 7.65 +3.67
48 May 5.22 9.90 +4.62
40 June 5.39 10.17 +4.78
176 July 6.06 10.05 +3.99
167 August +6.25 +10.35 +4.10
185 September 5.72 9.88 +4.16
74 October 4.74 8.55 +3.81
46 Nov. and Dec. 3.40 6.27 +2.87
998 Mean 4.51 8.07 +3.55
It is hence evident, from nearly 1,000 comparative observations, that the atmosphere is relatively more humid at Dorjiling than at
Calcutta, throughout the year. As the southerly current, to which
alone is due all the moisture of Sikkim, traverses 200 miles of land, and discharges from sixty to eighty inches of rain before arriving at Dorjiling, it follows that the whole atmospheric column is relatively drier over the Himalaya than over Calcutta; that the absolute amount of vapour, in short, is less than it would otherwise be at the
elevation of Dorjiling, though the relative humidity is so great.
A glance at the table at the end of this section appears to confirm this; for it is there shown that, at the base of the Himalaya, at an elevation of only 250 feet higher than Calcutta, the absolute amount of vapour is less, and of relative humidity greater, than
at Calcutta.
SERIES II.--_Observations at various Stations and Elevations in
the Himalaya of East Nepal and Sikkim._
ELEVATION 735 TO 2000 FEET.
EASTERN NEPAL AND SIKKIM.No. of
Obs. Locality Elev. Month Tem. D.P. Diff. Tens --------------------------------------------------------------------- 3 Katong Ghat. 735 Dec. 60.2 55.3 4.9 .447
Teesta river2 Great Rungeet, at bridge 818 April 82.8 63.5 19.3 .588
1 Ditto 818 May 77.8 60.3 17.5 .528
3 Tambur river, E. Nepal 1388 Nov. 60.6 57.0 3.6 .473
1 Ditto 1457 Nov. 64.2 59.1 5.1 .507
6 Bhomsong, Teesta river 1596 Dec. 58.6 52.0 6.6 .399
1 Ditto 1596 May 68.2 66.4 1.8 .647
5 Little Rungeet
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