320 Hartley — On the Conditions ofEquilihrium of Deliquescent and Hygroscopic Salts. 



In other words, it is a true chemical combination, dependent for its formation 

 on the cliemical property of the whole molecule of the salt, and not upon that of 

 any one or other of its constitutents. 



These results have a practical bearing on the preparation of the crystallized 

 compounds, inasmuch as we now know the conditions under which they may be 

 produced. 



I cannot omit mentioning that the whole series of observations was made 

 in my laboratory by Mr. J. A. Cunningham, a.r.c.sc.i., b.a., with conscientious 

 care and exactitude. The results were periodically checked by me, while the 

 condition of the salts and the temperatures were almost daily under my 

 observation. 



