54 



HIST04Y Of COBALT AND NICKEL, 



Nitfat at a maximum. 



Maximum, 100 parts of dry nitrat of nickel yielded by distillation 20of 



g»'n 5, acid 55 watcr and 25 of oxide; consequently contained 55 of acid. 

 Mater 20. These proportions are not exact, as the last portion of wate? 



were acidulous. 



Mfiriat. 



Con fains $5. 

 water. 



Anhidrosis 

 muriat. 



^luriat of NicheL 



Thi* is a very deliquescent, apple-green, gr^nulous crystal- 

 lization. 



Its traces on paper, when dry, are yellow. 



This muriat loses 55 of water. What remains is a yellovy 

 anhidrous muriat, changing green again in the air, by absorbing 

 water. 



If the anhidrous muriat be placed on the fire in a glass 

 retort, and the heat strongly urged, it does not melt ; the parts 

 that touch the glass are decomposed ^muriatic and oxigenized 

 muriatic acid are evolved ; and the undecouyposed salt sub- 

 limes in the form of flowers like mother-pf pearl, of a golden 

 yellow colour. These flowers absorb moisture, and become 

 green in the course of a couple of days. The muriatic acid 

 dissolves them with difficulty. 



Oxide 33-.V, iqo parts of muriat of nickel, decomposed by carbonatof 



water 55, mu- , ' . J 



riatic acid 11 -3. potash, produced 6 J or 02 of carbonat, which infers 33 or 34; 



of oxidp. 



Sutphaf of Nickel. 



Two sulphats. This is cither simple, or combined wifh potash. The first 

 crystallizes in hexaedral pressure, terminated by an -irregular^ 

 pyramid: the second, in rhomboids. 

 Simple sulpliat. The simple sulphat loses 4(5 of watcr; and this anhidrous 

 re iduum becomes green again by absorbing moisture, kept at 

 a strong red heat for an hour in a luted retort it is reduced in, 

 part to the state of sulphat with excess of base. The water, 

 takes up that which has lost none of its acid. 



100 parts of this sulphat afforded 64 of a light green carr 

 bonat. 



The triple salt with potash loses 24 of water. The resi- 



duuns 



Triple suj- 

 pSot. 



