276 W. FE. Gard—Analyses of Cast Nickel. 
iron, scales of graphite being plainly visible. It was found to 
tain: 
a b 
BPDON 66~ x 2°105 2°130 
Tot. 
Graphitic carbon.. 27030 1:990 
360 
re 3 
, thin Sac of electroplate nickel—which a careful 
nase ertien proved to be free from impurities. No. 2, gerne 
prepared r re ducing = Oxl by h ydrogen. No. 3, 
were then made, the — is weighed each time after 
cooling in the current of A portion of the electro-plate 
nickel was used for PR after the second exposure, SO 
that an amount equal to 5638 grams was present at the last 
eat. 
_ A condensed statement of the result is exhibited in the fol- 
lowing tables, in which the first column contains the original 
Gain in Gain in Gain in &% CO. at 
Weights of metals. 3t hours. 4% hours. 6} hours. close. 
Ni, "8597 0067 0823 [0672] 10°649 
2, Mt, 19008 0046 0071 0114 . 5°96 
3. Fe, 1°2837 0078 0096 0103 "795 
4. Co, 1°2697 0758 1680 1857 12°758 
No deposit of carbon could be detected on any part of the 
apparatus or on the metals at the close of the ape: The 
iron and nickel No. 2 were eee ae in appeara 
cobalt was somewhat aera It was as first stad very 
rous and spongy ; a part of its seekiges in weight may have 
een due to ete carbon. Nickel No. 2 was in the form 
of coarse compact grains presenting bcs little sur- 
face. The electro-plate nickel at the end of the operations ha 
become brittle, and resembled gas carbon in color and luster ; 
treatment with nitric acid readily dissolved the nickel, leaving 
a spongy mass of easily combustible carbon. A broken sur- 
