191 



XXII. FOR SHOWING THE DIFFERENCES IN THE VALUES OF THE ELASTIC 

 FORCE OF AQUEOUS VAPOR, ADOPTED BY DIFFERENT AUTHORITIES, 



FORCE OF VAPOR EXPRESSED IN ENGLISH INCHES FOR TEMPERATURES 

 OF FAHRENHEIT. 



Temper- 

 ature 

 of Air, 



Fahren- 

 heit. 





 10 

 20 

 30 

 32 



40 

 50 

 60 

 70 

 80 



90 



95 



100 



FORCE OF VAPOR EXPRESSED IN MILLIBIETRES FOR CENTIGRADE 

 TEMPERATURES. 



Temper- 

 ature 

 of Air, 

 Centi- 

 grade. 



-20 

 -15 

 -10 

 - 5 

 



+ 5 

 10 

 15 

 20 

 25 



30 

 35 

 40 



B 



155 



