496 M. Regnault on the Specific Heat of Simple Bodies, 



Mean . . . 0-21224. 

 ^^the 2 per cent, of metallic iron which the metal contains be 

 taken into account, the specific heat of pure aluminium will be 

 found to be 0*2143, and the product of this specific heat by the 

 equivalent is 36 64. 



Cobalt. 



The display of Messrs. Johnson and Matthey of London con- 

 tained some beautiful samples of cobalt and nickel ; I have taken 

 advantage of them to make some new determinations of their 

 specific heat. Unfortunately both the metals contained carbon, 

 particularly the nickel. 

 M 



Y' 



T 



6' 



A 

 c 



Mean 



0-10696. 



The product of this specific heat by the atomic weight 369 

 gives 39*47. This specific heat is probably a little too great ; it 

 is however identical with that which I found for cobalt in my 

 former experiments. 



Nickel. 



In my previous experiments, I found for nickel prepared by the 

 calcination of the oxalate in a closed vessel the specific heat 

 0*1086. My new experiments have given a slightly difi'erent 

 value; but the nickel of Mr. Johnson was very carburetted, as 

 was easy to observe on dissolving it in hydrochloric acid. 



