﻿Intelligence and Miscellaneous Articles. 315 



Cerous nitrate 48*7 



Cerium chloride 47*6 



Cupric sulphate 49*5 



,, nitrate 50*7 



chloride 48*9 



„ bromide 47*7 



,, acetate 48*0 



II. In the solid salts, too, almost the same values are obtained, 

 especially when they contain water of crystallization. Thus the 

 atomic magnetism for 



Crystallized didymium sulphate is . . . 107*2 

 Crystallized cupric sulphate is 49*6 



If, however, the solid salts are anhydrous, their atomic magnetism 

 is in general somewhat less, as has been found in a previous investi- 

 gation in the case of cobaltous sulphate, ferrous oxide, and ferrous 

 chloride. 



Thus the atomic magnetism of anhydrous cerous sulphate is 44*9. 

 These diminutions in the atomic magnetism of anhydrous copper salts 

 are considerable, even when they are combined with ammonia. It is, 

 for 



Anhvdrous cupric sulphate 42-2 



2CuS0 4 + 5NH 3 43-5 



2CuS0 4 + NH 3 45-1 



2CuS0 4 + 2NH 3 + aq 42*1 



2CuS0 4 + NH 3 44-6 



Cupric chloride (anhydrous) 40*0 



,, saturated with ammonia. . ; 37*1 



,, dissolved in water 47*2 



bromide (anhydrous) 24*0 



,, saturated with ammonia. ... 41*1 



,, dissolved in water 48*0 



A similar deportment is exhibited by the solid nickel salts. While 

 the mean atomic magnetism of the dissolved salts is 142, that of 

 Crystallized nickel sulphate is .... 139*2 



Anhydrous nickel sulphate 131*0 



Ammonium nickel sulphate 135*6 



The solid anhydrous chlorides of nickel and of cobalt exhibit a 

 higher atomic magnetism (156 and 378-395 respectively). 



These variations obviously depend upon the different densities, 

 and are especially prominent with very dense salts — for example, 

 cupric bromide (specific gravity =4*38). If the connexion between 

 the particles of the salts is diminished by the intervention of water, 

 as in the case of the hydrates or of ammonia (as in the ammoniacal 

 copper salts), the atomic magnetismi s at once diminished, and still 

 more so by dissolving the salts. 



III. The magnetism of the copper salts is very remarkable, and 



