b D. VAN NOSTRA NDS PUBLICATIONS. 



GRUNER (M. L.) The Manufacture of Steel. Translated 

 from the French, by Lenox Smith, with an appendix on the 

 Bessemer process in the United States, by the translator. 

 Illustrated. 8vo, cloth S3 50 



HALF-HOURS WITH MODERN SCIENTISTS. Lectures 

 and Essays. Ky Professors Huxley, Barker, Stirling, Cope, 

 Tyndall, Wallace, Roscoe, Huggins, Lockyer, Young, 

 Mayer, and Reed. Being the University Series bound up. 

 With a general introduction by Noah Porter, President of 

 Yale College. 2 vols i2mo, cloth, illustrated 250 



HAMILTON (W, G.) Lseful Information for Railway Men. 

 Sixth edition, revised and enlarged 562 pages, pocket form. 

 Morocco, gilt 200 



HARRISON (W. B.) The Mechanic's Tool Book, with Prac- 

 tical Rules and Suggestions for Use of Machinists, Iron- 

 Workers, and others. Illustrated with 44 engravings. 

 I2mo, cloth 150 



HASKINS (C. H.) The Galvanometer and its Uses. A Man- 

 ual for Electricians and Students. Second edition. i2mo, 

 morocco 1 50 



HENRICI (OLAUS). Skeleton Structures, especially in their 

 application to the Buildingof Steel and Iron Bridges. With 

 folding plates and diagrams. 8vo, cloth 1 50 



HEWSON (WM.l Principles and Practice of Embanking 

 Lands from River Floods, as applied to the Levees of the 

 Mississippi. 8vo, cloth 2 00 



HOLLEY (ALEX. L.) A Treatiseon Ordnance and Armor, em- 

 bracing descriptions, discussions, and professional opinions 

 concerning the materials, fabrication, requirements, c; 

 bilities, and endurance of European and American Guns, 

 for Naval, Sea-Coast, and Iron-Clad Warfare, and their 

 Rifling, Projectiles, and Breech-Loading ; also, results of 

 experiments against armor, from official records, with an 

 appendix referring to Gun-Cotton, Hooped Guns, etc., etc. 

 94b pages, 493 engravings, and 147 Tables of Results, etc. 

 8vo, half roan 10 oc 



• Railway Practice American and European Railway 



Practice in the economical Generation of Steam, including 

 the Materials and Construction of Coal-burning toilers, 

 Combustion, the Variable Blast, Vaporization, Circulation, 

 Superheating, Supplying and Heating Feed-wster, etc., 

 and the Adaptation of Wood and Coke-burning Engines to 

 Coal-burning ; and in Permanent Way, including Road-bed, 

 Sleepers, Rails, Joint-fastenings, Street Railways, etc , etc. 

 With 77 lithographed plates. Folio, cloth 12 *o 



HOWARD (C. R.) Earthwork Mensuration on the Basis of 

 the Prismoidal Formulae. Containing simple and labor- 

 saving method of obtaining Prismoidal Contents directly 



