ON THREE BALLOON ASCENTS IN 1864 AND 1865. 



183 



7. Comparison of the Temperature of the Dew-point, as determined by 

 different instruments and methods, and comparison of their eesults 

 together. 



Table IX. — Showing the Temperature of the Dew-point, as determined at 

 about the same height by dirferent instruments and methods, and compa- 



rison of the results together. 



Under 1000 feet. 



From 1000 to 2000 feet. 



From 2000 to 3000 feet. 



