4.3.4: REPORT—1862, 
§ 4, Avoprep TEMPERATURES OF THE ATR AND DEw-Pornt, with HercHt, IN 
THE EIGHT Battoon AscENTs. 
From all the observations of the temperature of the air and of the dew- 
point in the preceding Tables, a determination was made of both 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 without a corresponding observation of 
the barometer. The numbers thus found are within brackets. The results 
are contained in the following Tables. 
Tasre I1.—Showing the adopted Reading of the Barometer, calculated Height 
aboye the Sea, Temperature of the Air, and Temperature of the Dew- 
point in eight Balloon Ascents. 
Frsr Ascent.—July 17. 
Time of |Reading of| Height Temp. || Time of |Reading of| Height em 
obserya- |the ae Sane the ee of the observa- |the Seems shinee the f the of the 
tion. |reducedto| levelof | %* ew- tion. |reducedto| level of Gad ew- 
A.M. 32°F. the sea. i | point. A.M. 32°F. the sea. T | point. 
hm in. feet. o ° hm in. feet. > ° 
95% oy 49° | 59°0 | 514 ||10 39 14°63 | 19380 | 36°5 21°6 
47 26°01 3835 | 45°° | 35°3 44 14°63 | 19336 | 34°0 | 21°3 
49 2522 4467 | 43°0 | 32°0 47 14°13, | 20238 | 31°5 14°6 
51 24°14 5802 | 34°8 | 32°% 48 see | (20512) | gr°0 
53 22°42 7980 | 32°5 | --- 50 13°64 | 21059 | 23°38 |—12°5 
54 20°02 8065 | 31°8 | 27°38 54 13°34 | 21792 | 19°70 |— 82 
55 21°58 | 8809 | 29°8 | 21°8 57 12°14 | 23949 | 37°5 |— 4°5 
56 20°93 9598 | 2672 | 17°6 |izx o 11°74. | 24746 | 16°0 |— 8'o 
58 19°63 11giz | 26°0 | 24°5 it | rrmq | 26177 1670 |— g'o 
10 2 19°28 11792 | 26°0 | 244 3 11°64 | 25022 1670 |— 8'5 
3 18°63 | 12709 | 26°0 | 20°38 5 11°64. | 25028 | 17°5 
4 -eee 1(13088) | 26:2 | 19°9 7 11°64 | 25077 13"0 
5 18°14 | 13467 | 280 | 23°7 12 II'95 | 24547 | 23°7 
8 17°24 | 14544 | 310 | 23°8 20 12°65 | 23868 | 27°0 
II 16°74. | 15704 | 31°6 | 22°7 25 03°IA | 223997 5 aoa 
15 16°04. | 16914 | 32°0 | 22°7 37 16°36 16282 | 29°7 9°4 
25 14°94 | 18844 | 37°2 | 24°6 38 18°94 | 12376 | 34°2 74 
27 14°64 | 19374 | 361 | 23°2 39 20°04 | 10539 | 37°0 
29 14°64 | 19415 | 38°2 | 21°8 40 20°54 9882 | 37°8 19°8 
30 14°64 | 19415 | 38° | 20°2 44 23°44 6330 
35 14°64 | 19485 | 42°2 | 19°5 45 24°24. 5432 
Between 10" 50™ and 11" 25™ in the last column, the numbers entered with 
the sign — before them imply that the temperature of either Daniell’s or Reg- 
nault’s hygrometer had been lowered to the degree stated, but that no dew 
was deposited, and therefore that the temperature of the dew-point was at a 
still lower degree. 
At 10" 50™ the readings of the Dry and Wet (free) were 24°-5 and 17°-2, 
giving a dew-point temperature of —26°-6. 
At 10" 50™ the readings of the Dry and Wet (aspirated) were 23°-0 and 
17°-0, giving a dew-point temperature of —20°6. 
At 10" 54™ the readings of the Dry and Wet (free) were 19°:2 and 11°2, 
giving a dew-point temperature of —47°5. 
At 10" 57™ the readings of the Dry and Wet (free) were 16°5 and 9°-5, 
giving a dew-point temperature of —44°-1; and the readings of the Dry and 
Wet(aspirated) were 18°5 and 8°-0, giving a dew-point temperature of —69°'9, 
, 
a 
