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ADAMS — FARM MANAGEMENT 



By R. L. Adams, Ppofessor of Farm Management, University of Cali- 

 fornia, McGraw-Hill Agricultural and Biological Publications. 670 

 pages, 6 x 9, 97 ilhistrations $4.00 



WARREN— A MANUAL OF DETERMINATIVE MINERALOGY 



By Charles H. Warren, Ph.D., Professor of Mineralogy, Massachusetts 

 Institute of Technology. 163 pages, pocket sise, flexible $2.00 



FRIES AND WEST — CHEMICAL WARFARE 



By Amos A. Fries, Brigadier-Genera!, C. W. S., U. S. A. ; Chief Chemi- 

 cal Warfare Service, and Clarence J. West, Major, C. W. S., Reserve! 

 Corps, U. S. A. 445 pages, 6 x 9, 121 Uhistration-s $3.50 



HAGER— OIL FIELD PRACTICE 



By Dorsey!Hager, Petroleum Geologist and Engineer. 310 pages, pocket 

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LELAND— PRACTICAL LEAST SQUARES 



By Ora M. Leland, Dean of the College of Engineering and ArchTtecture 

 and the School of Chemistry, University of Minnesota. 237 pages, 6 x g, 

 40 illustrations $3.00 



WASTE IN INDUSTRY 



By the Committee On Elimination of Waste in Industry of the Federated 

 American Engineering Societies, with a Foreword by Herbert Hoover. 

 402 pages, 6 x 9 $4.00 



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ROBINSON— ELEMENTS OF FRACTIONAL DISTILLATION 



By Clark Shove Robinson, Associate Professor of Chemical Engineer- 

 ing, Massachusetts Institute of Technology, formerly Chemical Engineer 

 with the E. B. Badger and Sons Company. Intern,ational Chemical 

 Series. 204 pages, 5% x 8, 41 illustrations $2 50 



MARSHALL — GRAPHICAL METHODS 



By William C. Marsh.\ll, Consulting Engineer; formerly Professor of 

 Machine Design, Sheffield Scientific School (Yale). 253 pages, 6 .v 9, 

 220 illustrations $3.00 



NILSON— RADIO QUESTIONS AND' ANSWERS 



By Arthur R. Nilson, Director of East Side Y. M. C. A. Radio School, 

 Xew York. 92 pages, pocket sice $1.00 



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