V. 



A PRACTICAL TREATISE 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. Copper and Iron 10.00 



Vol. 3. Steel, Fuel, and Supplement 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 

 plates $1.50 



VII. 



IRON 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, &c. Oblong morocco, pocket size $2.00 



VIII. 



A TREATISE ON THE ASSAYING OF LEAD, SILVER, COPPER, 

 GOLD AND MERCURY. By Bodeman & Kerl. Translated by 

 W. A. Goodyear. 12mo, cloth $2.50 



IX. 



A MANUAL OF PRACTICAL ASSAYING. By John Mitchell. 

 Fifth edition, edited by William Crookes. With numerous plates. 

 Thick 8vo, cloth $10.00 



X. 



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 $3.00 



*** 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 he prepaid by 

 mail on the receipt of the price. 



