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 : 



The various Substances. 



Sheep's wool 



Beaver's fur 



The fur of a Russian hare 



Eider-down 



q.,, f Raw, single thread 



( Ravelings of white taffety 1000 



T . ( Fine lint . . . 1000 

 Linen < 



(. Ravelings of fine linen 1000 



Cottan-wool .... icoo 

 Silver wire, very fine, gilt, 

 and flatted, being the ravel- 

 ings of gold lace 



1046 

 1044 

 1043 



IOOO 



1103 



IIO2 



1082 

 1089 



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

 was that of Cologne, the parfs, or least divisions, being 

 Briar P art f a mar k ; consequently 1000 of these 

 parfs make about $2% grains Troy. 



