ON THKEE BALLOON ASCENTS IN 1861 AND 1865. 



185 



Table XI. — Simultaneous readings of a delicate blaekcned-bulb thermometer 

 fully exposed to the sun's rays, and of a delicate thermometer carefully 

 shaded from the influence of the sun, the bulbs of the two instruments 



being Avitbin 3 inches of each other. 



December 1, 1864. 



December 30, 1864. 



O'O 

 O'O 



o-o 



February 27, 1865. 



Sun shining faintly. 



Sun hot to sense. 



