788 



on the fine experiments of ML Gay-Lussac. 

 During several singularly dry days in the 

 month of September, I saw the hair hygrometer 

 descend at Cumana to 64° (29.5° of the whale- 

 bone hygrometer), at a temperature of 28.7° 

 cent. 



Rains and Storms. 



The rainy season, which in other parts of the 

 tropics yields 100 to 115 inches of water (Vol. 

 vi, p. 276) per year, produces scarcely seven to 

 eight inches at Cumana. I collected in Sep- 

 tember and October (rainy season) : 



August 31 3.2^ 



September 8 2,0 



^ 5.4 



12 6.1 



15 2.1 



16 6.7 



18 



30 0.7 



October 2 8.8 



4 13.7 



6 3.3 



22 10.5 



24 0.9 



28 4.2 



30 0.9 



72.3 lines, or 0.163" 



