176 J. Wharton on the Manufacture of Spelier. 
The Lehigh Zinc Co., since taking possession of the — 
have maintained the hig character of its product, and the zin 
rolling mill which they have added to it turns ome sheet we 
of the very choicest Nae such as could only be made from 
spelter of the highest 
s excellence saalia mainly of course from the unusual 
purity of the ores of Saucon Valley; the silicate particularly, 
which has always been the predominant ore there, being notably 
freer from impurities, not o than most ores from other 
localities, but also than the carbonate which abounded in the 
pee after roasting, all pieces which from disoolneatiele or 
rejecting all the first and last products of distillation from eac 
charge in each retort. The zinc thus made, amounting to seve 
ral tons, went mostly to various chemists, ‘and is doubtless all 
consumed except a few ingots which I still retain. It was, 
however, no purer than that examined by Drs. Eliot and Storer, 
nor is this surprising, since the latter was made in a new fur- 
nace from silicate of zinc which had been weathered for a long 
time, and was thus freed from the ee clay which 
otherwise might have yielded some impuri 
The establishment whose origin is a. eat is still im 
apenas Ne idag ie and Pe its activity is now limited by 
reason 0 ah ges Hs OPP of ore, there is good reason t0 
believe hat this difficulty will be overcome when the magnifi- 
cent pumping wpparetis now being erected by we eign Zine 
Company shall enable them to mine at greater 
The entire spelter and ober | zine manufacture ee the United 
States, now a large and growi ay: 2 may fairly be said to 
have sprung from this tector for not only was it the pce 
in point of time by at least two years, but I believe that neither 
of the others succeeded until it availed itself of = services of 
men procured from this establishment. 
