Chemistry and Physics. 321 
in a manner which is fully described. These results are inter- 
molecular structure of the compound as indicated by its chemical 
relations and represented by the formula CCl,—-CH=(HO), 
CCl,—CH=0O; but the vapor of chloral hydrate has only one- 
half of the specific gravity (39°84) which the law of Avogadro 
would require. Hence it has 
volatilizing, the hydrate was resolved into chloral and water. 
ssuming that this vapor is a simple mixture of chlo1 apor 
Sphere saturated with aqueous vapor at the same temperature. 
On the other hand, if the vapor of chloral hydrate is a homo- 
ditions and potassic oxa chosen as the reagent because 
its affinity for water—as shown by the quantity of heat evolved 
during combination—is less than that o 1. Lastly, any 
Which the law of Avogadro requires. Hence M. Troost woul 
have us infer that shis law, as the basis of modern chemical phi- 
losophy, has failed, 
