HEW METAL NICKELINE. £55 



its carbonate : that of cobalt is of a beautiful poppy-blue, but 

 the carbonate of nickeline is a bluifh-green inclining to a pale 

 grey. — 3. By the colour of its oxide precipitated without car- 

 bonic acid : that of cobalt is of a deep blue, and changes on 

 warning to a blackifh-brown ; but this oxide of nickeline is 

 of a greeni(h-bJue, and its colour does not change. 

 Nickeline refembles nickel — 



I. By its ftrong magnetic quality ; although this is not fo Refemblances 

 great as that of nickel. — 2. By its malleability, which how- line and ™ ci{ ^ 

 ever is lefs than that of nickel. — 3. By the deep green of its 

 folutions; although this colour is not fo beautiful as that of 

 the folutions of nickel. — 4. By the lofs of this green colour 

 when its neutral combinations are deprived of water. — 5. By 

 the colour of the acid folution with an excefs of ammonia, 

 which cannot be well perceived by candle-light. 

 Nickeline differs very diftinftly from nickel — 



1. Becaufe it cannot be reduced without a combuftible Differences t*» 

 body added to it. — 2. Becaufe nitric acid attacks and oxidates a ^J e ^"i^i % c " 

 it more eafily. Nickel is not near fo readily acted on by the 

 nitric acid if it is not mixed with the nickeline, which almoft 

 always happens with the magnetic nickel which is confidered 

 to be in a ftate of purity, and which has not been reduced 

 per ft before my difcovery. — 3. It alfo differs from nickel by 

 the property firft mentioned of thofe in which it refembles 

 cobalt. — U By the colour of its combinations with the acids, 

 when deprived of water : This colour in nickel is almoft a 

 buff (chamois), and in nickeline a reddifh, except in the 

 nitrate of nickeline, which cannot be deprived of water with- 

 out decompofing it. — 5. By the colour of the precipitates, men- 

 tioned in the fecond and third articles concerning the proper- 

 ties wherein this new metal differs from cobalt, which are in 

 thofe of nickel of a green colour entirely different from thofe 

 of nickeline. which latter are of a much more agreeable 

 green, efp?~ r -My thofe of the carbonate. 



Letter 



