SCIENTIFIC PUBLICATIONS. 88 



PICKWORTH, CHAS. N. The Slide Rule. A Practical 



Manual of I nst ruction fur all Users of the Modern Type of Slide Kule, 

 containing Suooint Explanation of the Principle of SI i.l- Rule Com- 

 putation, together with Numerous Rules and Practical Illustrations, 

 exhibiting the Application of the Instrument to the Everyday Work 

 of the Engineer Civil, Mechanical and Electrical. Seventh edition. 

 12mo, flexible cloth f 1.00 



PLANE TABLE, The. Its Uses in Topographical Sur- 

 veying. From the Papers of the United States Coast Survey. 



Illustrated. 8vo, cloth $2.00 



"This work gives a description of the Plane Table employed at the 

 United States Coast Survey office, and the manner of using it." 



PL ANTE, GASTON. The Storage of Electrical Energy, 



and Researches in the Effects created by Currents, combining Quan- 

 tity with High Tension. Translated from the French by Paul B. 

 Elwell. 89 illustrations. 8vo $4.00 



PLATTNER'S Manual of Qualitative and Quantitative 



Analysis with the Blow- Pipe. Hiyhth c, I it ion, revised. Trans- 

 lated by Henry B. Cornwall, E. M. Ph. D.. assisted by John H. Cas- 

 weH, A. M. From the sixth Qerman edition, by Prof. Friederick 

 Kolbeck. Illustrated with 87 woodcuts. 463 pages. 8vo, cloth. 

 net, $4.00 



PLYMPTON, Prof. OEO. W. The Aneroid Barometer : 



Its Construction and Use. Compiled from several sources. Eighth 



edition, revised and enlarged. 16mo, boards, illustrated. $0.50 



Morocco, $1.00 



POCKET LOGARITHMS, to Four Places of Decimals, 



including Logarithms of Numbers, and Logarithmic Sines and Tan- 

 gents to Single Minutes. To which is added a Table of Natural 

 Sines. Tangents, and Co-Tangents. 16mo, boards 60 



POPE, F. L. Modern Practice of the Electric Tele- 

 graph. A Technical Hund-Book for Electricians, Managers and 

 Operators. Mftcent/i edition, rewritten and enlarged, and full;/ 

 illustrated. 8vo, cloth $1.60 



POPPLE WELL, W. C. Elementary Treatise on Heat 



and Heat Engine-*. Specially adapted for engineers and student* of 

 engineering. l'2mo, cloth, illustrated $3.00 



- Prevention of Smoke, combined with the Economi- 

 cal Coinl.UHtiou of Fuel. With diagrams, figures and tables. 8vo. 

 cloth, ilhiHtrated net, $3.50 



POWLES, H. H. Steam Boilers (In Prett.) 



PRAY, Jr., THOMAS. Twenty Years with the In- 

 dicator; lii-ing a Pr.n-ticiil Text-Book f or the Engineer or the Student, 

 with no complex Formulae. Illustrated. 8vo, cloth $2.60 



