4.72 ‘ REPORT—1862. 
The laws of moisture here indicated are—an almost uniform state of humi- 
dity of the air to the height of 3000 feet, viz. 77; then a sudden increase 
to 80 in the next 1000 feet, and to 83 by 5000 feet, which slightly decreased 
to 82 by 6000 feet. 
When the sky was partially clear, the degree of humidity 
On the ground was ........ 63 from 4 experiments. 
ty ROOD EOCG | Wie sic scralle winnie bon 68°, *¥ 
BOTs Kogeteerti ss oo «bs ddl «os eS Ss 
UA Be Se = Se 16 4 5 e 
SOOO Sa Leoke db etek < Wo ey se 
BIMOO a toe bayahelt ab cite sb a 68 36 * 
GOOD sp ret orenn eoatenswpee o> et > 
Above the clouds the degree of humidity 
At {000 feet was...'.....4. 64 from 7 experiments. 
2). a a ee ee 58, Ses 
SE. she aia ass wb Ba 35 OF : 
HELI C ot Os aN ee oe a 52.33 7 is 
CRUISU os Sadia Iai Pian AE Shea 5 48 , 5 - 
TLC ed a eo a AS. 3s » 
OU nn 4 win ores cs AS eg DB 33 
CAMOORE St | a chne ocean t et oe pe te & 
UH (I Cas i easy Ros ee 53s 3; 8 ty 
TET, Ole 0 Os eae, A ae 45 Ss 3 
A FRCUM 1pca< Ales tesaisle aie 3-5. 33 3, 2 Pe 
Thott) (CRS ie oes ae ae Pi ae i 
RUE LOS lal aR RC oe 36. 3 2 = 
1 0) Le ig RS I a gl Seo oy. ee ee 
PLDI: oo cl Sate or Bs ote Ba. as 2 i 
DOO iar {SER sips see Bl s5~ ak 55 
POU ce GS b ule oa ba be fs ok - 
24,000 
25,000 
er oN unknown. 
28,000 
29,000 
The laws of moisture here indicate a humidity on the ground, with a par- 
tially clear sky, less by 15 than in cloudy skies, increasing to 77 by 3000 
feet, then nearly constant to 5000 feet, when the humidity abruptly de- 
creased to 69, and then nearly evenly at the rate of 5 in 1000 feet, till at 9000 
and 10,000 feet it is 52; the degree then constantly decreases, till at heights 
exceeding 25,000 feet the degree of humidity is reduced to less than 10; and 
it would seem that at the higher elevations there is an almost entire absence 
of water. 
These seem to be the general laws; but this regular diminution is evidently 
often interrupted, and strata of moist air exist at different elevations even 
up to 20,000 feet, and these may be of considerable thickness. 
