Height, in feet, 
above the mean 
level of the sea. 
April 18. 
24.000 
23000 
22000 
21000 
20000 
19000 
18000 
17000 
16000 
15000 
14000 
13000 
12000 
11000 
10000 
gooo 
8000 
7000 
6000 
5000 
4000 
3000 
2000 
1000 
° 
ON FIVE BALLOON ASCENTs IN 1863. 477 
Tasce IIT. (continued.) 
Trento AscEnt. 
Temperature of the Air. 
Ascending. Descending. 
Betw Ob Sted, (n Ob fated | 
etween! Circum- ~, |Adopted|_.3t€ etween! Cireum- »~ , Adopted ated 
git | Stance] eed "emp. feet. | a ence evel | temp. Oct 
ance | ance. 
cree | en | | cs ee | aes | | aes cone | 
° ° o ° / ° ° 
124 1270 + 04 125 
13°0 | 12'2 |+ 08 12°9 
1470 | 12°5 | 1°5 Tao, 
és 12°90 1370 — ro 135 
= 12°04) TaeSes tay 14°0 
: s 12°90 | 142 |— 22 14°3 
Hobe |= [257 ae 14°6 
2 5 | 183 | 176 1+ o7) g 15°3 
2 : : ; ‘ 
° = cele 196 |+ ed e > 16°6 
ES 25-0 |. 21-7 |— omg Ea, ol, 1633 
a 2370 | 2470 |— rol] © g 17'0 
£ 2470 | 261 |— 21) 2 oy) 2am 
a 31°8 | 28-2 |+ 36 3 5S |, 20°'0 
= i——| 32°0 | 305, | Pale eee aa 
a jg | 342 | 32°5: | oT ES 
g@ | B= | 325 | 349 |— 24/1 3 
BH | SH | 356 | 378 |— 22] & 
5 | 46° | 4r0 oro || = 
45°0 | 45:0 | o°0| 
479 | 486 |— 07} 
Below} 52°3 | 52°3 0°70 
cloud.| 56°7 | 55°38 |+ o'9 
Ses 59'S eke 
ae 63°27 || cose 
April 18.—The sky was cloudy ; the amount of deviation of temperature 
was very small till the height of 7000 feet was reached, when a cold current 
was met with in the cloud; on passing out of the cloud a warm stratum was 
passed, and then alternating warm and cold currents were passed, but the 
amount of deviation was never large. 
clusions can safely be drawn from the observations in these respects. 
The descent was so rapid that no con- 
