182 



REPORT 1865. 



the general laws at the different seasons of the year. I defer for the present 

 making any further use of them, particularly as their combination would not 

 change the general Tables previously found. 



Table VIII. — Showing the Degree of Humidity at every 200 feet. 



Height 



above the 



level of 



the sea. 



feet. 



5400 

 5200 

 5000 

 4800 

 4600 

 4400 

 4Z00 

 4000 

 38CO 

 3600 

 3400 

 3200 

 3000 

 2800 

 2600 

 2400 

 2200 

 2000 

 1800 

 1600 

 1400 

 1200 

 1000 

 800 

 600 

 400 

 20O 

 o 



Dec. 1, 1864. 



December 30, 1864. 



February 2", 1865. 



Wean. 



State of the Sky. 



Generally 

 Clear. 



53 



45 

 42 



45 

 5° 

 55 

 54 

 57 

 59 

 65 

 66 



66 

 66 



62 



65 

 76 

 81 



79 

 76 

 72 

 72 

 72 

 73 

 73 

 75 

 72 

 72 

 74 



54 

 57 

 60 

 58 

 59 

 59 

 58 

 57 

 5* 

 48 

 58 

 66 

 86 

 79 

 83 

 83 

 82 

 82 

 83 

 87 

 83 

 86 



93 



9 1 



89 

 88 



82 



83 



Cloudy. 



84 



62 

 78 



92 

 91,85 

 9291 

 91196 80 

 96958 

 IOO 9480 

 92.92 80 

 ... 92 

 ... J90 



90 



Cloudy 



■■3 

 a 



is 

 83 

 83 



Si 



83 



Si 

 82 

 82 

 82 9c 

 81 90 

 7991 

 77 S 9 

 7689 



37 

 47 

 5i 

 52 

 60 



7i 

 74 

 75 

 77 

 78 

 74 

 72 

 69 

 69 

 69 

 68 

 66 



65 

 64 

 62 

 60 

 60 

 57 

 57 

 60 



59 



Generally 

 Cloudy. 



37 



39 

 4i 

 39 

 4i 

 42 

 46 

 50 

 55 



59 

 60 



61 



66 



69 



73 

 70 

 70 

 69 

 6 9 



69 



70 



69 

 66 



67 



87 

 81 

 80 



79 

 78 

 78 

 79 

 77 

 74 

 7i 

 68 



65 

 66 



65 

 66 

 66 

 66 



Cloudy. 



9 1 



94 

 9 1 

 94 

 94 

 97 

 92 



87 

 83 

 79 

 78 



74 

 72 



7i 

 7i 

 72 



74 

 74 

 76 



1. 2. 3. 4. 5. 6.7.8.9.10.11. 12. 13. 14. 15. 16.17.18.19.', 



The numbers in this Table show, as in all similar experiments at all times 

 in the year, that the moisture in the air is very different at the same elevation 

 at different times ; and that the moisture on the same day was differently dis- 

 tributed over different places. The most remarkable in this Table is that of 

 the first descent on February 27, the balloon having ascended through clouds, 

 descended through a break in the clouds, and then ascended and descended 

 again through clouds, showing a marked difference at the same elevation in 

 the degree of humidity of the air. These results are too few, and having 

 been deduced from experiments made at a different season of the year from 

 those previously made, had better be left till more winter ascents have been, 

 made to combine with them. 



