Of the Quantities of Moisture, ^c. 233 



room being at the temperature of 45° F. ; after which 

 they were carefully weighed (in the room), and were 

 found to weigh as under mentioned. 



They were then removed into a very damp cellar, and 

 placed upon a table in the middle of a vault, where the 

 air, which appeared by the hygrometer to be completely 

 saturated with moisture, was at the temperature of 45° 

 F. ; and in this situation they were suffered to remain 

 three days and three nights, the vault being hung round, 

 during all this time, with wet linen cloths, to render the air 

 as damp as possible, and the door of the vault being shut. 



At the end of the three days I entered the vault with 

 the balance, and weighed the various substances upon the 

 spot, when they were found to weigh as is expressed in 

 the third column of the following: table : — 



Silver wire, very fine, gilt, 



and flatted, being the ravel- \- looo 

 ings of gold lace 



N. B. The weight made use of in these experiments 

 was that of Cologne, the 'parts^ or least divisions, being 

 =^ esiae P^^^ of a mark; consequently looo of these 

 parts make about c^n^ grains Troy. 



