or COBALT. 



bear without decomposition, lost only 0*38 

 grain, equivalent to one-third of an atom, evi- 

 dently hygrometrical. Hence, the constituents 

 of the salt are 



1 atom tartar ic acid 8-25 



1 atom protoxide of nickel 4-25 



12-5 



The salts of nickel, in general, contain a good 

 deal of water of crystallization, though like the 

 other genera, there is a considerable difference 

 in this respect between the species. The tar- 

 trate alone is anhydrous the carbonate and 

 phosphate contain 3 atoms water the oxalate 

 and chromate 4 the nitrate and acetate 5 

 the arseniate contains 6 the sulphate 7> 

 the binarseniate 10. 



12. SALTS OF COBALT. 



1. Sulphate of cobalt. This salt has a deep Sulphate, 

 red colour, and crystallizes in rhombic prisms, 

 similar to the form of sulphate of iron. Its con- 

 stituents are 



1 atom sulphuric acid 5 



1 atom protoxide of cobalt 4'25 

 7 atoms water . 7*875 



Y3 



