ON FIVE BALLOON ASCENTS IN 1863. A479 
Tasre III. (continued.) 
TWELFTH ASCENT. 
Temperature of the Air. 
Ascending. Descending. 
Height, in feet, = 
|, on ede li Hee 
level of the sea. |Between Gircum- -. |Adopted|_J2te etween om. »_ |Adopted ate’ 
dunes, |stances,| Server | temp. [euch | eat | stances:| 2774 |" temp, [elect of 
ance. ance. 
July OF —_ a 3 o Thick é é ° 
4 . . t Ba . . . 
4000 &_& | sphere. 610 | 591 |+ 1°9 S ey fren 3°0 3°0 oo 
wn & 
gooo =| 44.4 | Thin | 60:7 | 607 | or] & B 65°3 | 65:2 |-4+ o% 
2000 g™ mist. | 62°9 | 62°9 oo || BYE The bal|loon th/en 
1000 | Sit, 69°3 | 67°5 |= 2°73) Oe turned to asce|nd. 
° ic) ° 75°9 oie 8 
; Vv 
Gooo fa gf | Very | 535 | 540 |— 0°5|| Stet | minty. | $3°0 | gx°8 [4 12 
5000 co || 568 | 57°5 |— o7 || 4S 540 | 53°6 |+ 04 
4000 zl sty 60°4 | 6074 oro|| 8 B 56-4 | 564 aoe 
3000 ga sg 6570 | 63°9 |+ 11 he, 58°38 | 58:8 foere) 
2000 oie) : oe oe i RS Ss 61-3 | 618 |— ors 
1000 Fs a on oft Baareel| (eens 64°7 | 64°7 owe) 
The baljloon thien 
turned |to asce|nd. 
of | ex 
2000 aso 662 | 65°6 |+ o6 Qos 63°3 | 63°5 |— o2 
1000 & « &, 66°0 | 67°5 |— T5\l5 ¢ 66:1 | 66:0 |4 on 
ae BS 
1000 Sie 65°9 | 65°5 |+ 0°4]|° 63°38 | 64°5 |— 07 
° | le tote aa -+ | 68-6 67°99 |+ o7 
THIRTEENTH ASCENT. 
July 21 Between Cloud 
3000 gg Au? 535. ) S87 |e O% Boe higher.| 53°5 | 53°6 |— o7 
Ba a cloud Lae 
2000 ge ie 561 | 564 |— 03/5 © §|ineloud| 55°3 | 55:1 |+ o2 
1000 © 45/Ineloud.| 600 | 59°4 i+ 06 5° 580 | 57°77 |+ 0 
° 614 | 62°5 |— II 
; nL Wetting 
3000 @ A} Fog. | 54-2 | 53°7 |+ 05 | 5 oe ha fog. | 52°I | 52°5 |— 0°4 
2000 Ga_fyjimcloud) s4:0 | say |— 0'9| Box Fn dlack| 55°5 | 55" |+ 0-4 
aio Bn Fog: | 58-0 | 58°0 0°0 |“ § | cloud. | 59°6 | 59: oo 
PA fies B = Rain. 
ea]_. Vy 
1000 fa & i Goro | 6o'0 00 Fes 2 pects 60'0 | 60'0 0-0 
fe) eo 3) dark. | +> : ++ |g EZ landrain| 61-5 | 61-8 |— 03 
tnd, BS 
July 11.—The sky was nearly covered with cloud, and the amount of de- 
viation from the adopted temperatures was always small. 
July 21.—Heavy rain was falling on the earth during the ascent. The 
temperature declined almost evenly, and there is no great departure from the 
adopted curve. 
The next Table has been formed by taking the difference between conse- 
cutive numbers in the preceding Tables in each ascent. 
