] 1 I Prof. Regnault on the Specific Heat of some Simple Bodies. 



ingots, readily scratched by the file, and which were flattened 

 under the hammer. This nickel save the following results : — 



M . 



. . 3ll? r -00 



311^00 



T . 



. 96°-77 



97°-88 



& . 



. 14°-87 



18°-81 



A<9' . 



6°-2413 



6°1315 



A . 



. 434? r -98 



434^-98 



C . 



. . 0-10659 



0-10845 



Mean 



0-10752. 



The product of the specific heat by the atomic weight 350 is 

 3762. 



The second specimen was lent me by M. Dumas, who had 

 great confidence in its purity. It consisted of three almost 

 spherical bullets, and could be readily filed : — 



M 



229^-88 



229e r -88 



229^-88 



229^-88 



229^-88 



P 



l* r -5015 



ls r -5015 



ls r -5015 



ls r -5015 



ls r -5015 



T 



97°55 



97°-85 



97°-45 



97°'20 



97°-45 



6' 



ll°-32 



14°-54 



10°-53 



10°-69 



11°12 



AO 1 



5°-4547 



5°-3615 



5°-5610 



5°-52l0 



5°-5287 



A . 



422e r -30 



422^-30 



422^-30 



422^-30 



422^-30 



C 



0-10970 



0-11169 



0-11100 



0-11071 



0-11112 



Mean 



0-1108. 



The product of this specific heat by the atomic weight is 38-78, 

 a number perceptibly higher than that found for the other speci- 

 mens of nickel. 



Cobalt. 



In my first memoir I found 0*1071 for the specific heat of 

 cobalt. The metal had been prepared by heating at a strong 

 furnace-heat oxalate of cobalt pressed in a porcelain crucible, 

 which was itself enclosed in a crucible lined with charcoal. I 

 recently examined two ingots of the same metal which had been 

 prepared by M. Rousseau, by calcining at furnace-heat a mixture 

 of oxide of cobalt and sal-ammoniac. This metal was malleable, 

 and readily scratched by the file. 



M . . 



. . 113s r -905 



113^-905 



P • • 



. . 1^-5015 



l& r -5015 



T . . 



. . 97°*55 



97°-09 



& . . 



. . 12°-27 



12°-43 



A& . . 



. . 2°-5535 



2°-5260 



A . . 



. . 434^-98 



434^-98 



C . . 



. . 0-10113 



0-10075 



Mean 



0-10094. 



