SERIES II.—Khasia Observations.
| Place | Month | Elevation by Barometer | Temp. B.P. | Air | Elevation by B.P. | Diff. |
| Churra Amwee Nurtiung Nunklow Kala-panee Myrung Syong Moflong Chillong | June September October July June, July, Sept., Oct. July July July, Aug., Oct., Nov. November | (feet) 4,069 4,105 4,178 4,688 5,302 5,647 5,725 6,062 6,662 | 204·4 205·1 205·0 203·9 202·2 201·9 201·8 201·4 201·2 | 70·3 67·7 70·0 69·8 65·8 69·4 70·8 64·8 62·8 | (feet) 4,036 4,041 4,071 4,333 5,202 5,559 5,632 5,973 6,308 | (feet) – 33 – 64 – 107 – 355 – 100 – 88 – 93 – 89 – 354 |
| Mean | 5,160 | 5·016 | – 143 |
K.
ACTINOMETER OBSERVATIONS.
The few actinometer observations which I was enabled to record, were made with two of these instruments constructed by Barrow, and had the bulbs of their thermometers plunged into the fluid of the chamber. They were taken with the greatest care, in conformity with all the rules laid down in the “Admiralty Guide,” and may, I think, be depended upon. In the Sikkim Himalaya, a cloudless day, and one admitting of more than a few hours’ consecutive observations, never occurs—a day fit for any observation at all is very, rare indeed. I may mention here that a small stock of ammonia-sulphate of copper in crystals should be supplied with this instrument, also a wire and brush for cleaning, and a bottle with liquid ammonia: all of which might be packed in the box.
Active 6.568. Time always mean.
Jillapahar, Dorjiling, Elev. 7,430 feet, Lat. 27° 3′ N., Long. 88° 13′ E.
A.—APRIL 19TH, 1850. Watch slow 1′ 15″ mean time.
| Hour | Act. | Temp. Act. | Act. reduced | Barom. | Air | D.P. | Diff. | Sat. | Black Bulb | |
| 8.00 to 8.13 a.m. 8.15 to 8.28 a.m. 9.00 to 9.13 a.m. 10.00 to 10.13 a.m. 11.00 to 11.13 a.m. Noon to 12.13 p.m. 1.00 to 1.13 p.m. 2.00 to 2.13 p.m. | 11·1 15·0 17·7 19·1 19·0 18·8 17·2 17·4 | 65·5 69·5 71·5 72·5 75·0 75·0 73·3 74·0 | 9·9900 12·2645 14·5140 15·4710 14·9150 12·7600 13·8976 13·8330 | 22·960 22·948 22·947 22·946 22·944 22·939 22·914 | 53·5 56·0 57·0 58·5 60·3 59·4 60·3 | 33·8 37·2 39·7 38·2 44·8 40·7 44·1 | 19·7 18·8 17·3 20·3 15·5 18·7 16·2 | ·505 ·513 ·550 ·500 ·592 ·546 ·577 | 88·0 111·5 110·0 121·0 125·0 120·0 122·0 108·0 | Day unexceptional, wind S.W., after 10 a.m. squally. Dense haze over snowy mountains. |
B.—APRIL 20TH.
| Hour | Act. | Temp. Act. | Act. reduced | Barom. | Air | D.P. | Diff. | Sat. | Black Bulb | |
| 8.0 to 8.30 a.m. 9.0 to 9.13 a.m. 10.0 to 10.13 a.m. | 11·8 17·8 18·8 | 64·0 73·3 65·0 | 10·9150 14·2750 14·7580 | 22·969 22·974 22·985 | 54·2 56·2 57·0 | 43·4 44·1 42·5 | 10·8 12·1 14·5 | ·691 ·662 ·609 | 74·0 92·0 92·0 | Dense haze, S.E. wind, cloudless sky. |
Superintendent’s House, Dorjiling, Elev. 6,932 feet.
C.—APRIL 21ST. Watch slow 1′ mean time.