I 444 ] 



Examination of Schuckbtirg' s Coefficient by the Jit Jl Teji. 



Firji Experiment. 



Barometer 29,27 inches (29.3)) 1°. He found a bottle containing 

 Thermometer 53'' j 'S.fJ^o grains of water, and con- 



fequently containing 53,55 cubic inches. As 253,18 grains of 

 water occupy the fpace of a cubic inch, temperature 62*^, to weigh 

 16,22 grains lefs when exhaufted of, than when full of air. after 

 making every neceffary allowance. Philof. Tranf. 1777, 560. 

 Confequently 53,55 cubic inches of air of that temperature, and 

 under that preflion, weighed 16,22 grains. Now if 53,55 cubic 

 inches weigh i6>22 grains, 1000 cubic inches fhould weigh 302,89 

 grains, and fhould retain that weight under any diminution of 

 volume by cold, as there is no diminution of the quantity of 

 ,matter. 



ado. To reduce thefe 1000 inches of air to the 'volume they 

 would occupy at 32'', I find that 53^ exceeds 32" by 21 degrees; 

 then fubtrading from 1000 inches the number of inches, which 

 according to Schuckburg they-gained by twenty-one degrees above 

 32, namely 2^43 ^ 21 = 51,03 inches, we have the volume they 

 would occupy at 32^, namely 948,97 (fay 949) inches. And thefe 

 .fhould weigh 302,89 grains. 



-itio. 



