‘ 
; 
C. W. Eliot and F. H. Storer Me Impurities in Zinc. 143 
Name of Zinc. Amount of lead in per cent. 
from Wrexham - - - 1192 
: “ Mines Royal (Neath - - 0°823 
aca Dillwyn ye pe - 1661 
essrs. Vivian, - - L516 
Minute vase of ee ig of tin were observed in several of the 
samples of zinc. In no case however gy the sum of both these 
metals have aacuaual pie one ; twenty. fif one rj coher Se ae 
That tron is usually present in commercial zinc—in quantity gener- 
ally less than 0-2 per cent—being derived from the mals ip which 
hat from New Jersey contained 0°2088 per cent of i 
In regard to nickel, cobalt, manganese, etc., which haes’ been said to _ 
eur at times in sti, the authors remark. that, “the occurrence of 
metals a never to und in any spelter mich 
may be safely asserted, sa that - nickel, eh ae sieugi 
are ever to be found i commercial z inc, they occur there saeldentally: 
ree ey pt Sap and in quantities hid to be appreciated, 
utterly insignifican 
* Carbon,—With a to carbon as an impurity of zine, we have attempted 
to determine this single point,—Does it occur in the residue insoluble in dilute acids, 
as has been generally believed, but never to our knowledge proved? One fact alone 
ders the ence of i 
W 
Jersey, Rousseau Fréres, Berlin, and Mint zi 
chlorid of iron, acidulated with chlorhydric acid. If carbon or silica were 
any appreciable oe complete solution of the residue in this reagent 
not be expected. g the residues from our various spelters for carb we 
net 
From thirty to forty grammes of the zine to be tested were dissolved in pure 
PM sass by Karsten in Karsten u. Dechen’s Archiv f. Mineralogie, xvi, 628; 
also Dingler’s Polyt. Journ. lxxvi,l93. 
