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LSH/1/1/2/1/354 · Part · 1934-11-05
Part of The Ludlow & Sherriff Collection

SUMMARY:
Reference page tabulating hypsometer temperatures against corresponding elevations, with a note on allowances below 185°. Provides incremental feet per degree between 185° and 182° and detailed numeric entries.

CONTENT:
For below 185° allow 570 ft for 185° to 184° and 572 for 184° to 183° 574 ft for 183° to 182° etc.

HYPSOMETER

185.0 14698 17.05 187.3 13394 189.6 12096 191.9 10811
1 641 4 337 7 040 192.0 10755
2 584 5 281 8 11984 1 699
3 528 6 224 9 928 2 644
4 471 7 167 190.0 11872 19.00 3 588
5 414 8 111 1 816 4 533
6 357 9 054 2 760 5 477
7 300 188.0 12998 18.19 3 704 6 422
8 244 1 942 4 648 7 366
9 187 2 885 5 592 8 310
186.0 14130 17.42 3 829 6 536 9 255
1 073 4 772 7 480 193.0 10199
2 017 5 716 8 424 1 144
3 13960 6 660 9 368 2 088
4 903 7 603 191.0 11312 19.41 3 033
5 857 8 547 1 257 4 9978
6 790 9 490 2 201 5 923
7 733 189.0 12434 18.59 3 146 6 867
8 676 1 377 4 090 7 812
9 620 2 321 5 034 8 757
187.0 13563 17.81 3 265 6 10978 9 701
1 506 4 209 7 922 194.0 9646
2 450 5 153 8 867 1 591

LSH/1/1/6/1/4 · Part · 1938-04-27 - 1938-06-06
Part of The Ludlow & Sherriff Collection

SUMMARY:
Page records hypsometer readings with times and dates for 1938 at various locations, including passes and a camp. Notes include adjustments such as “Add 50 ft.” and “300' below summit.”

CONTENT:
(1938) HYPSOMETER READINGS. (Indian Standard Time.)

  1. LALUNG. 200.2° ✓ 65° 2.0 p.m. 27/4 26. MIRA LA. ✓ 184.0 50° 9.0 a.m. 16/8 Add 50 ft.
  2. KARGONG LA 196.1 ✓ 60 3.0 p.m. 10/5 27. LUSHA LA. ✓ 186.2 41 11.0 a.m. 19/9. 300' below summit.
  3. LANGONG. 190.8 ✓ 58 11.0 a.m. 27/5 28. MOLO. ✓ 193.0' 56 1.30 p.m. 14/4
  4. CHIANANG 189.0 50 11.30 a.m. 3/6 29. RA LA (Pukso). 183.0° 48° 18/10.
  5. Camp below CHUBUMBU 189.8 55 3.0 p.m. 6/6 30.
  6. CHUBUMBU LA 18
LSH/1/1/4/1/135 · Part · 1933-10-12
Part of The Ludlow & Sherriff Collection

SUMMARY:
At a high pass the diarist records hypsometer and magnetic bearings to Trim and the south end of Lagyap Thongtso, helps a frightened boy, and returns to a cold, snowy camp. Tsouppen completes a difficult circuit over Shupten La in deep snow and brings a divot of Primula, while a search towards Karutra yields no seeds though masses of Gentiana ornata are noted. Plans are made to leave on the 16th, with a halt noted for the 15th October.

CONTENT:
East side, while I stayed on top and took a hypsometer reading. It gives B.P. 183.6°, Temp. 33°, Time 8.30 a.m. Height approx. 15,534'. A magnetic bearing to Trim (L. bank) was 277° and one to the South end of the Lagyap Thongtso was 115°. Leaving the pass I had great difficulty in getting my boy away. He lost his nerve and would not move. But I took him by the hand for half a mile, and then he was alright. Tsouppen found deep snow all round. He did the circle over the Shupten La where snow was very hard and difficult, and had trouble with his man. He found nothing at all, and was unable to dig out anything from the snow, which varied between 1 and 3 feet deep. However he brought in one more divot of the fine yellow petiolaris primula. I hope they live now till I get them home. I did a long chukka round towards Karutra, first looking for seeds and then heeling, but had no luck. The Gent. ornata on that hillside are a perfect wonder, just in masses and all still in full bloom. Back to a cold and pretty miserable camp at 2.30 p.m., where it is still snowing, and blowing very hard. None of us will mind leaving here on the 16th.

15th October. Halt. More snow than ever last

LSH/1/1/2/1/352 · Part · 1934-11-05
Part of The Ludlow & Sherriff Collection

SUMMARY:
A table of correction factors for mean temperatures used in hypsometer height calculations, covering values from 20 to 76. Marginal notes record Donkar 188.5, Minoha 210.9, and 78°.

CONTENT:
Correction for mean temperatures for Hypsometer Heights.

20 .9734 43 1.0244 66 1.0755
21 .9756 44 1.0266 67 1.0777
22 .9778 45 1.0288 68 1.0799 Donkar 188.5 Minoha 210.9 78°
23 .9801 46 1.0311 69 1.0822
24 .9823 47 1.0333 70 1.0844
25 .9845 48 1.0355 71 1.0866
26 .9867 49 1.0377 72 1.0888
27 .9889 50 1.0399 73 1.0911
28 .9912 51 1.0422 74 1.0933
29 .9934 52 1.0444 75 1.0955
30 .9956 53 1.0466 76 1.0977
31 .99