438 



HUMIDITY OF AIR AT VARIOUS ELEVATIONS. Appendix G. 





ELEVATION 17,000 TO 18,500 



FEET. 













EAST NEPAL 



AND SIKKIM. 



CALCUTTA. 



No. 



of 



Obs. 



1 

 1 



1 

 3 



2 



2 



10 



Locality. 



Elev. 



Month. 



Tern. 



47'5 



46-5 

 38-8 

 54-0 

 41-8 

 40-1 



44-8 



D. P. 



30-9 

 34-6 

 35-3 

 4-4 

 30-3 

 25-0 



26-8 



Diff. 



16-6 

 11-9 

 3-5 

 49-6 

 11-5 

 15-1 



18-0 



Tens. 



•191 



•218 

 •224 

 •072 

 •188 

 •155 



•175 



Tern. 



85-7 

 88-8 

 907 

 91-1 

 84-1 

 86-5 



87-8 



D. P. 



79-7 

 80-0 

 79-3 

 61-1 

 78-4 

 65-5 



74-0 



Diff. 



6-0 



8-8 



11-4 



20-0 



5-7 



21-0 



Tens. 



•991 

 1-002 

 •981 

 •543 

 •950 

 •627 



Kinchinjhow . 



Sebolali pass . . • 



Donkia mountain . 



Bliomtso . . • • 



Donkia pass . 



Ditto . ... 



17,624 

 17,585 

 18,307 

 18,450 

 18,466 

 18,466 



Sept. 



Sept. 



Sept. 



Oct. 



Sept. 



Oct. 



Mean 







12-2 



•849 



Humidity- 

 Weight of Vapour 



. -532 

 . 1-90 gr. 



SUMMARY. 



Calcutta 



. -648 

 8-78 gr. 



HUMIDITY. 



i 



WEIGHT OP VAPOUR. 



No. of 

 Obs. 



Elevations in 

 Feet. 



Sta- 

 tions. 



9 



9 



13 



23 



15 



13 



14 



13 



5 



10 



6 



6 



9 



8 



6 



5 



154 



Sikkim. 



Cal- 

 cutta. 



•663 

 •740 

 •732 

 •730 

 •730 

 •701 

 •668 

 •730 

 •724 

 •740 

 •760 

 •815 

 •678 

 •719 

 •658 

 •648 



Diff. 

 Sikkim. 



Sikkim. 



Cal- 

 cutta. 



Diff. 

 Sikkim. 



48 



49 



48 



137 



260 



76 



1023 



193 



18 



123 



104 



140 



53 



87 



17 



10 



735 to 2000 



2000 „ 3000 



3000 „ 4000 



4000 „ 5000 



5000 „ 6000 



6000 „ 7000 



7000 „ 8000 



8000 „ 9000 



9000 „ 10,000 



10,000 „ 11.000 



11,000 „ 12,000 



12,000 „ 13,000 



13,000 „ 14,000 



15,000 „ 16,000 



16,000 „ 17,000 



17,000 ., 18,500 



•717 

 •820 

 •858 

 •837 

 •865 

 •845 

 •826 

 •858 

 •747 

 •878 

 •860 

 •890 

 •634 

 •763 

 •640 

 •532 



+ -054 

 •080 

 •116 

 •107 

 •135 

 •144 

 •158 

 •128 

 •023 

 •138 

 •100 

 •075 



— •044 

 + -044 



•018 



— •116 



5-57 

 5-45 

 4-23 

 433 

 4-70 

 3-60 

 3-85 

 4-23 

 2-80 

 3-35 

 3-46 

 3-37 

 1-61 

 2-55 

 1-53 

 1-90 



6-88 

 7-13 

 6-60 

 7-12 

 7-34 

 6-71 

 7-28 

 8-75 

 6-28 

 8-70 

 9-00 

 9-75 

 6-28 

 8-95 

 7-80 

 8-78 



— 131 i 

 1-68 

 2-37 

 279 

 2-64 

 3-11 

 343 

 4-52 

 3-48 

 4-35 

 5-54 

 6-38 

 4-67 

 6-40 

 6-27 

 6-88 



2386 

















Considering how desultory the observations in Sikkim are, and 

 how much affected by local circumstances, the above results must 

 be considered highly satisfactory : they prove that the relative 

 humidity of the atmospheric column remains pretty constant 

 throughout all elevations, except when these are in a Tibetan 

 climate ; and when above 18,000 feet, elevations which I attained 

 in fine weather only. Up to 12,000 feet this constant humidity 

 is very marked ; the observations made at greater elevations were 



