to the size of their Molecules, fyc. 295 



Now, since the distance of the molecules is in the ratio of 

 their affinity for caloric a, and since the density is necessarily 

 in the inverse ratio of a 3 , the cube of this distance, M. Avo- 



« 7 



cradro obtains „ ° -,; - as the ratio which ought to be con- 



stant in all liquids in the case of a non-alteration of the mole- 

 cules, in passing from the gaseous to the solid state, or in the 

 case where the number of duplications and divisions are the 

 same in the liquids compared, and which ought to be double, 

 quadruple, &c. in one liquid of what it is in another, if in one 

 of them there are duplications of the molecules which do not 

 take place in another. 



In applying this formula to water, alcohol, ether, and sul- 

 phuret of carbon, M. Avogadro assumes the minimum of 

 temperature at — 70° cent, and consequently T = 170 o . 



{l+gT)m 



But 537.3 x 2 = 1074.6, which differs little from 1160, 

 which it should be on the hypothesis of the duplication of the 

 molecule. In applying the formula to ether and sulphuret 

 of carbon, and comparing them with water, we obtain, 



Ether. Sulphuret of Carbon. 



T = 170° cent. T = 170° cent. 



d =0.581. d =0.6426. 



g = 0.00427. g = 0.0034. 



m =0.00244. m= 0.001514. 

 a =1.318. 



«3— 2.291. <i 3 =0.212. 



^L- = 316.16. rrr :3 4w = S7 - 45 - 



• The affinities of water and alcohol for caloric, are 23.22, and 2.791, that 



of oxygen being unity ; but in taking that of water for unity, we have 



2.791 

 that of alcohol = ^^ = 1-256. 



