Vs 
A PRACTICAL TREATISH ON METALLURGY. Adapted from the 
last German edition of Prof. Kerl’s Metallurgy. By William Crookes 
and Ernst Rohrig. In three vols., thick 8vo. Price.......... $30.00 
Separately. Vol. 1. Lead, Silver, Zinc, Cadmium, Tin, Mercury, Bis. 
muth, Antimony, Nickel, Arsenic, Gold, Platinum, and Sulphur $10.00 
Vol, 2.; .Copperiand Iron. jo... a: ocr eh oe 10.00 
Vol. 3. Steel, Fuel, and Supplement......... 29 t's oie eee 10.00 
VI. 
THE CALCULATIONS OF STRENGTH AND DIMENSIONS OF' 
IRON AND STEEL CONSTRUCTIONS. With reference to the 
latest experiments. By Prof. J. J. Weyrauch, of Polytechnic Insti- 
tute of Stuttgart. Translated by A. J. Du Bois. 8vo, cloth, with 
VIl. 
TRON SMELTERS’ POCKET ANALYSIS BOOK. By Thomas Whit- 
well. Containing Tables and Blanks for Analysis of Ores, Coal, Coke, 
Limestone, Iron, Steel, Slag, Bricks or Clay, with Tables of Specific 
Gravities, &c., &. Oblong morocco, pocket size............ oon. pe.-00 
Vill. 
A TREATISE ON THE ASSAYING OF LEAD, SILVER, COPPER, 
GOLD AND MERCURY. By Bodeman & Kerl. ‘Translated by 
W. A. Goodyear. 12mo, cloth................... see $2.50 
IX. 
A MANUAL OF PRACTICAL ASSAYING. By John Mitchell. 
Fourth edition, edited by William Crookes. With numerous plates. 
Thick Svo, clothsi.. o05 Phe ed aaa sk oa de ae eee $10.00 
NOTES ON ASSAYING AND ASSAY SCHEMES. By P. De Peyster 
Ricketts, E.M., Ph.D., of School of Mines, Columbia College, N. Y. 
New edition, revised with additions. 8vo, cloth................ 2.00 
*,* These Text-Books will be supplied to SCHOOLS and COLLEGES at 20 per cent, 
discount from the printed prices. 
TEACHERS and PROFESSORS may have single copies for examination, with ref- 
erence to introduction, at a discount of one-third, and they will be prepaid by 
mail on the receipt of the price. 
