ON FIVE BALLOON ASCENTS IN 1863. 497 
The numbers in this Table show, as in the previous experiments, that the 
moisture in the air at the same elevation is very different at different times ; 
the numbers in the last column of the Table show the average results in the 
two states of clear and cloudy skies, with the number of experiments upon 
which each result is based. By combining those with cloudy sky with those 
previously obtained, according to the number of observations upon which 
each result was based, the following results were obtained. 
With an overcast sky, the degree of) ~ teen OF, é 
humidity on the earth was ........ } (Se ements. 
eee OO TeeGate sss cpm: o's pa etre Td Shoes 4g 
C10 hae tire RR a aC 13 5y uae 9 
BOO Sa ee hangs Hert apie 5 A 76 ,, 24 a 
OQ Si. otk e's 5 + aug e ghee 2 Se Y os 
7 ete ARE Marae ek mates NS 7or 4 | 20 > 
sao aie ss. 2 atynig eee Lee gen * 
See yy ss vc ee ee to aioe es ale 5. 5 
Bras). ochre oats eins yee 4, 6 «5 4 
SO 5. gi ito «+ » arptale < 465° 5 - 
SOOM 55 een ory «4 6%. fake sok SY ite ae! fs 
_ | RCA pee ane tani - Baie ty 95 
EMME shoes sag Oe os tga eee ae ae 55. , 4 Be 
Rs? bosonic o's a sites sien 53 ,, 864 i 
sot 3 5 '« S Sigfaces ose o-oee 45) a5, ae - 
I ae sw ae Des eae oe Boiss eee 55 
es cs e's singe cle saves oe Des Typ ee 3 
ae ee (a a ” 
MUNN Pacino xg sn 0 09 oe 5 . 
ras Sing v0 es ot es an pr Se 99 
2 ivctheert ncn ee Fo) a eR ae ‘i 
MTS fae sss ees be ecds za see 2 
Serene srt ro SY 2 ee Bale & Pr 
EER heres rais'h's iy 3 a's y's AQIOOS OL = 
The law of moisture here indicated is an almost uniform state of humidity to 
the height of 5000 or 6000 feet, that is, to the usual height of the cloud plane; 
then a sudden decrease and continued decrease to 14,000 feet. At eleva- 
tions exceeding 14,000 feet with cloudy skies the number of experiments are 
too few to speak with confidence of the results ; the humidity, however, seems 
generally to decrease ; the high numbers at 15,000 and 16,000 feet are pro- 
bably accidental, 
1863. ; 25 
