[ 446 ] 



Or in Englifh meafures, &c. 2090,8 cubic inches weigli 616 

 grains, barometer 28,77, thermometer 68", confequently 1000 

 cubic inches (liould weigh 294,62 grains. 



ado. The difference between 68*? and 32" is 36°. Then by 

 Schuckburg's coefficient 2,44 x 36, ftiould be fubftradled from 1000 

 inches to reduce them to the volume they would occupy at 32**, 

 namely 87,48 inches. Now 1000 — 87,48=912,52 inches. 



3tio. By the table, 1000 cubic inches at 32°, under the pref- 

 fion of 28,7 mercurial inches, weigh 315,5 grains, and confequently 

 912,52 inches fhould weigh 287,90, but the number found by 

 Schuckburg's rule weighs 294,62, Its aberration therefore amounts 

 to 6,72 grains in excefs. This however may proceed from the 

 circumflance that this air was perfedlly dry^ and therefore heavier 

 than atmofpheric air ufually is. 



The coefficient for this air, which is far lefs expanfible than 

 moift air, feems to be 1529. 



Third Experiment. 



Barometer 29,841 According to Lavoifier (See the French 



Thermom. 545 3 tranfl:ition of my Eflay on Phlogifton, p. 39.) 



100 cubic inches of common air weigh 46 grains, barometer 28, 



thermometer 



