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HASKINS, C. H. The Galvanometer and its Uses. 

 A Manual for Electricians and Students. Fourth edition. 12mo, 

 cloth f 1. 60 



HATJFF, W. A. American Multiplier ; Multiplications 



and Divisions of the largest numbers rapidly performed. With index 



giving the results instantly of all numbers to 1000 x 1000 = 1,000,000 ; 



also tables of circumferences and areas of circles. Cloth, 6} x 15}. 



$5.00 



HAUSBRAND, E. Drying by Means of Air and 



Steam. With explanations, formulas and tables, for use in practice. 

 Translated from the German by A. C. Wright, M. A. 12mo, cloth, 

 illustrated $2.00 



Evaporating, Condensing and Cooling Apparatus : 



Explanations, Formulae, and Tables for Use in Practice. Translated 

 from the Second Revised German Edition by A. C. Wright, M. A. 

 With numerous figures, tables and diagrams. 8vo, cloth, illustrated, 

 400 pages net. $5.00 



HAUSNER, A. Manufacture of Preserved Foods and 



Sweetmeats. A Handbook of all the Processes for the Preservation of 

 Flesh, Fruit, and Vegetables, and for the Preparation of Dried Fruit, 

 Dried Vegetables, Marmalades, Fruit-Syrups, and Fermented Bever- 

 ages, and of all kinds of Candies, Candied Fruit, Sweetmeat*, Rocks, 

 Drops, Dragees, Pralines, etc. Translated from the Third Enlarged 

 German Edition, by Arthur Morris and Herbert Robson, B. So. 8vo, 

 cloth, illustrated, 223 pages net, $3.00 



HAWKE, WILLIAM H. The Premier Cipher Tele- 

 graphic Code Containing 1(>0,000 Words and Phrases. The most com- 

 plete and most useful general code yet published. 4to, cloth .$5.00 



- 100,000 Words Supplement to the Premier Code. 



All the words are selected from the official vocabulary. Oblong 

 quarto, cloth $5.00 



HAWKINS, C. C., and WALLIS, F. The Dynamo; 



its Theory, Design and Manufacture. 190 illustrations, 12ino, cloth, 

 $3.00 



HAY, ALFRED. Principles of Alternate - Current 



Working. 12mo, cloth, illustrated $2.00 



HEAP, Major D. P., U. S. A. Electrical Appliances of 



tin- Present Day. Report of the Paris El<'<-tric;il Imposition of 1KHI. 

 2."0 illustrations. Kvo, cloth $2.00 



HEAVISIDE, OLIVER. Electromagnetic Theory. 



8vo, cloth, two volumes. each, $.1.00 



HEERMANN, PAUL. Dyers' Materials: an intro- 

 duction t<> tin- Kx:unination, Valuation and Application of the most 

 important substances used in Dyeing, Printing, liloaching and Fin- 

 ishing. Translated by Arthur C. Wright, M. A. 12mo, cloth, illus- 

 trated net, $2.50 



