Chap. 23.] Its Repulfionfir Silver. 133 



nickel, fufed with borax, likewife produces a hyacin- 

 thine colour. The calces of nickel are of a green 

 colour. 



The moft remarkable properties of the regulus of 

 nickel are, a repulfion for filyer, and a ftrong attrac- 

 tion for fulphur. It has fo ftrong an affinity for ful- 

 phur, as to attract it from moft other metals. 



Nickel combines by fufion with fulphur into a hard 

 mineral of a yellow colour, with fmall brilliant plates, 

 which, when ftrongly heated in contact with air, de- 

 flagrates and emits very luminous fparks, fimilar to 

 thofe afforded by iron when forged. Cronftedt informs 

 us that this metal is foluble in liver of fulphur, and 

 forms a compound refembling the ores of copper. 

 The fulphur can only be feparated from nickel by 

 repeated fufions and calcinations. 



Cronftedt affirms that nickel forms, with bifmuth, 

 a brittle and fcaly regulus. Nickel has not yet been 

 Applied 4:o any ufe, 



