ON THREE BALLOON ASCENTS IN 1865 AND 1866. 



389 



creasing to 36°-l at this elevatioii ; it then increased to 37°*2 at the height of 

 1800 feet, the sky heing cloudy as seen from here, and the air was misty. In 

 the next 100 feet the temperature decUned 0°-2, and as much as l^-i in the 

 succeeding 100 feet ; the temperature then dechned slowly to 34° at 2600 feet, 

 the clouds being at a lower elevation : the decline of temperature continued 

 to the height of 4000 feet, where it was 271°, and there was very little change 

 in the next 600 feet. On descending, the temperature slowly and steadily 

 increased to 32°-4 at the height of 2500 feet, when the light was accidentally 

 extinguished, and no more observations could be made. 



Table III. {contlmied). 



TWEXTY-I'.IGHTH AsCKKT, 



Tiniipcnituri' <■!' the Air. 



