62 Experiments on piirq Nickel. [Jan. 



magnetic energy of nickel = 35, and that of iron = 55. The 

 magnetic energy of cobalt was likewise tried, and found = 25 ; 

 but as this metal was not quite pure, this experiment, as well as 

 the magnetism of an alloy of cobalt and nickel, will be hereafter 

 repeated. 



3. AUoTj of Nickel and Platinum. 



This, as well as all the subsequent alloys, was made upon char- 

 coal kept intensely hot by a stream of oxygen gas, according to the 

 method described in my Manual for the Analysis of Minerals. A 

 grain of each of the two bodies, nickel and platinum, was put upon 

 the charcoal. After they had been softened by the application of 

 the heat for about half a minute, both bodies incorporated together 

 in a very striking manner. They formed an alloy possessing nearly 

 the fusibility of copper, although nickel by itself is nearly as infu- 

 sible as platinum. The alloy was completely malleable, acquired a 

 fine polish, and had a light yellowish-white colour, not unlike that 

 of sterling silver. Its magnetic energy was still 35. 



4. Gold and Nickel [equal parts). 



Both metals very readily melt into one round button ; pretty 

 hard, harder than the preceding alloy ; externally malleable ; 

 capable of a fine polish ; colour yellowish-white, a little darker than 

 the preceding alloy. The magnetism continued = 35. 



5. Silver and Nickel {equal parts). 



When I attempted to alloy these two metals, I made the follow- 

 ing observations. The silver melted in two seconds, and the nickel 

 remained for some time unmclt*„d upon the silver. In about a 

 minute the silver, it is true, took up the nickel, but did not dis- 

 Eolv " it. ^Vhen the heat was continued some time longer, the two 

 metals appeared to unite ; but at at instant the silver burnt away 

 with a blue fiame, and left the malleable nickel behind itj but 

 ■about one half of the nickel likewise was burnt. 



6. Copper and Nickel {e.jual parts). 

 Both metals melted tc ether in four seconds. The alloy was 

 brittle and gnmular ; the col'^ur reddish-white ; and the fracture 

 porous. It exhibited no trace of magnetism. 



7. Nickel and Iron. 



Iron and nickel easily melted together into a round bead. The 

 nickel was first melted, and the iron added to it, to prevent the 

 last metal from boing burnt by the heat. By continuing the heat, 

 the greater part of the iron separated from the nickel in the state of 

 a black oxide, still attracted by the magnet. By weighing the alloy 

 I found that it consisted of ten parts of nickel and four parts of 

 iron, or tlie iron amounted to rather less than one-third of the alloy. 

 This alloy was moderately hard, quite malleable, and had the colour 

 of steel. Its magnetism was = 35. , 



8. Phosphori/s and Nickel. 

 The bead of nickel was heated red-hot, and then a small piece of 



