ON FIVE BALLOON ASCENTS IN 1868. 473 
Between 4° 27" and 5" 56™ I failed in obtaining any deposition of dew on 
either Daniell’s or Regnault’s hygrometer, but the wet-bulb acted very satis- 
factorily during these times, and indicated the very low readings inserted in 
the Table. 
Tas re II. (continued.)—Tenta Ascent.—April 18. 
] : 
, Reading : i [Reading] preicht Temp. | Temp. 
jar. ofthe shoe ti Leas Pd ofae Era ie the hove the Aone: of the of ee 
tion. ma Raced level of rete Wet- | Dew- tion. | vadned level of |° ‘Air, Wet- | Dew- 
PeMy tg 39° F, the sea, * | bulb. | point. P.M. to 32°F. the sea. bulb. | point. 
hm s/ in. feet. 5 = 5 hm _  “s/ in feet. a 2 5 
o 12 29°80 esos | 630 | 5572 50°2 || © 55 14°05 | 20338 
15 29°80 | esse | 59°5 | 53°5 48°3|| 56 14°05 | 20338 
I 13 29°66 eeee | 60°8 | 54°75 4911/2 0 13°75 | 20943 | 1370 | 5:0 |--57°1 
14 29°66 | ....-|61'°5 | 54:2 47°38 2 14°05 | 20428 
TJ | ZOE, |p L030. 15972 | 54°0 48°4 | 9 13°65 | 21120 | 14°2 
17+ | 28°57 1603 | 57°2 | 5171 45°5 | 10 seins eres [1570 | 3°70 go"o 
18 27°97 | 2185 | 56:0 | 50°5 45°4 II Aer cece | 14'S 
18 30) .... | (2380) | 55:2 | 49°0 43°1 12 13°35 | 21646 | 13°0 
19 27°57 | 2575 |54°0 | 48-0 42°2 13 13°30 | 21760 
20. 26°75 | 3555 |49°2 | 43°0 | 364\| 14 | 13°30 | 21760 | 165 
21 10)25°79 | 4392 |47°2 | 41°0 34°1 15 13°25 | 21869 a xe 13°2 
22 30) 24°50 | 5759 | 412 | 3571 27°5 15 30, 13°20 | 22041 | 130 | 62 |—69°7 
24 wiaiy = esos 140°5 | 37°0 33°6|| 22 30) 12°75 | 22954 |12°0| oo |—97-2 
24. 15}23°90 | 6420 | 39°0 27 12°60 | 23258 |12°3 
24 30/2361 | 6744 | 37°0 | 35:2 32°6 28 e+e | 23460 | 12°0 
25 30|23°21 | 7180 | 34°5 | 33°2 aro0 28 30| 12°50 | 23460 | 12:0 
26 22°77 | 7694 | 32°8 29 12°50 | 23461 
27 30) 22°70 | 7764 29 30) 12°48 | 23500 
29 20°85 | 1coz0 | 32°0 | 25°8 121 30 12°50 | 23460 
29 30) 20°63 | 10342 3° 30) 13°35 | 23753 | 12°5 | O75 |—92°8 
30 20°12 | 11055 | 31°5 | 24°2 5°9 31 12°45 | 23539 | 12°2 
32 19°13 | 12259 | 23°2 33 12°65 | 23109 | 12°71 
32 30] ...- |(12600) | 23°0 33 10) 12°75 | 22907 |12°5 ro |—88-4 
33 eres con eto 33 30, 13°35 | 21765 
34 | 18°35 | 13340 | 23°2 33 45 13°55 | 21381 
34 10] 17°95 | 14030 | 21°0 34. 13°65 | 21189 
35 e+e+ | (14600) | 21°0 37 30, 16°64 | 15998 |15°7 | 7:0 |—55°6 
35 30| 17°24 | 14986 | 20°0 38 30,17°24. | 14967 
40 16°25 | 16504. |17°2 | 13°0 |—19°0! 39 seee 1(14670) [16-7 | 8°83 |—51-4 
42 15°86 | 17057 |12°0 | 6'0 |—20°6|| 4o 17°64. | 14311 
43 15°81 | 17140 | 12°r | 5°r |—49°3|| 40 30, 18:14 | 13590 | 16-5 | 10°0 — 39°7 
47 15°46 | 17749 | 1270 | 5'0 |—49°5 AT 30) anes £9 TAS! PAS S| AS 
48 15°81 | 18886 |iz70 | 4°5 |—53°8} 42 19°94. | IIIo00 |180 | 15°75 |— 3:2 
49 14°81 | 18886 |12°0| 4°99 |—50°3 43 20°04 | 11003 |20°2 | 181 |+ 4°6 
50 sees |(1g140) | 11°8 57 |—41°6 43 30) 20°24 | 10785 | 24:2 | 19°0 |—10°6 
52 14°37 | 19644 | 10°5 44. 20°94. |. 9609 |261 | 20°0 |—10-4 
52 50) 14°15 | 20163 | 11°5 48 +++» | ground | ,, | 2070 
54. 14°15 | 20163 | 11°3 | 6:0 |—35-2 
The rope connecting us with the earth broke; I was consequently thrown, 
by this sudden departure, among the instruments, and both Daniell’s and 
Regnault’s Hygrometers were broken; I was therefore solely dependent on 
the Wet-bulb Thermometer, whose action was throughout good. 
N.B, From all the observations of the temperature of the air, the wet-bulb, and the 
dew-point in the preceding Tables, a determination was made of these elements, with the 
corresponding readings of the barometer and heights. Some of the numbers in the column 
for heights have been interpolated when either of these elements have been observed with- 
out a corresponding observation of the barometer. The numbers thus found are within 
brackets. The results are contained in the Tables in pp. 472-475, 
