§90 On Evaporation. 
_ Evaporation of Spirits, Ether, &c. 
If the law of evaporation abave given apply 
to water in every part of the scale of heat, no 
reasonable doubt can be entertained respecting 
its application to other liquids. I have not- 
withstanding made several experiments on others, 
the results of which are conformable to the same 
law. Some of them follow :— 
1. Spirit of wine.—Evaporated from a sur- 
face of 4 inches in diameter, 54 grains in 25 
Minutes: air 53°; aqueous atmosphere at 49°, 
and beginning to rain with a moderate breeze. 
It would proportionally have been 121 grains 
from a vessel of 6 inches in diameter. This gives 
nearly 5 grains per minute. The same spirit 
boiled at or near 180°. 
Now from the data, water of 83° is equivalent 
in force to spirits of 59°: and it may be seen 
that the evaporating force of water of 83° is 
nearly 5 in the first and second columns of grains 
of the table. It seems probable that the 
aqueous atmosphere does not diminish the evapo-~ 
ration of spirits as it does that of water. 
2. Ether. 1. Puta phial containing ether, 
and a small tin vessel of 13 inch diameter into a 
scale and balanced them exactly: then poured 
the ether into the evaporating vessel and put 
