i68 SCIENCE PROGRESS 



The Elements of the Mathematical Theory of Electricity and Magnetism. 

 By Sir J. J. Thomson, O.M., M.A., Sc.D., D.Sc, LL.D., Ph.D., F.R.S.. 

 Master of Trinity College, Cambridge, Professor of Physics in the Uni- 

 versity of Cambridge, Professor of Natural Philosophy in the Royal 

 Institution, London. Fifth Edition. Cambridge : at the University 

 Press, 1921. (Pp. 410.) Price 25s. net. 



Ammonia and the Nitrides, with Special Reference to their Synthesis. By 

 Edward B. Maxted, Ph.D., B.Sc, F.C.S. London: J. and A. Churchill, 

 7 Great Marlborough Street, 1921. (Pp. vi + 116, with 16 illustrations.) 

 Price 7s. 6d. net. 



The Chemistry of Synthetic Drugs. By Percy May, D.Sc, F.I.E. Third 

 Edition, revised. London : Longmans, Green & Co., 39 Paternoster 

 Row, 1921. (Pp. XV + 248.) Price 125. 6d. net. 



This edition differs but little from that of three years ago. Most of 

 the typographical errors have been corrected, though two on p. 50 have 

 escaped notice ; a few paragraphs have been modified, and some minor 

 additions made. 



Creative Chemistry. Descriptive of Recent Achievements in the Chemical 

 Industries. By Edwin E. Slosson, M.S., Ph.D. London : University 

 of London Press, 18 Warwick Square, E.C.4, 1921. (Pp. xii + 311, with 

 38 illustrations.) Price 12s. 6d. net. 



The Electronic Conception of Valence and the Constitution of Benzene. By 

 Harry Shipley Fry, Ph.D., Professor of Chemistry and Director of the 

 Chemical Laboratory, University of Cincinnati. London : Longmans, 

 Green & Co., 39 Paternoster Row, 1921. (Pp. xviii + 300.) Price i6s. 

 net. 



Applied Colloid Chemistry. General Theory. By Wilder D. Bancroft, 

 Professor of Physical Chemistry at Cornell University. New York : 

 McGraw-Hill Book Company, 370 Seventh Avenue ; London : 6 and 8 

 Bouverie Street, E.C.4, 192 1. (Pp. viii + 345.) Price 185. net. 



The Chemistry of Plant Life. By Roscoe W. Thatcher, M.A., D.Agr., Dean 

 of the Department of Agriculture and Director of the Agricultural 

 Experiments Station, University of Minnesota. New York : McGraw- 

 Hill Book Company, 370 Seventh Avenue ; London : 6 and 8 Bouverie 

 Street, E.C.4, 1921. (Pp. xvi + 268.) Price i8s. net. 



Chemistry of Pulp and Paper Making. By Edwin Sutermeister, S.B. New 

 York : John Wiley & Sons ; London : Chapman & Hall, 1920. (Pp. 

 vii + 479, with 55 figures.) Price 36s. net. 



This book contains chapters on Cellulose ; Fibrous Raw Materials ; The 

 Soda Process ; The Sulphate Process ; Bleaching ; Sizing ; Colouring ; Test- 

 ing Wood Pulps, and many other processes connected with paper-making. 



Chemical Technology and Analysis of Oils, Fats, and Waxes. By Dr. J. 

 Lewkowitsch, M.A., F.I.C., late Consulting and Analytical Chemist, 

 and Chemical Engineer Examiner in " Soap Manufacture " and in 

 " Fats and Oils " to the City and Guilds of London Institute. Edited 

 by George H. Warburton. Sixth Edition, entirely rewritten and en- 

 larged. In Three Volumes. Vol. I. London : Macmillan & Co., St. 

 Martin's Street, 192 1. (Pp. xviii + 682, with 59 figures.) Price 365. net. 



Vocational Chemistry for Students of Agriculture and Home Economics. By 

 John J. William, Ph.D., Assistant Professor of Agricultural Biochemistry, 

 School of Agriculture, University of Minnesota. Farm Life Text Series. 

 Edited by K. C. Davis, Ph.D., Philadelphia and London : J. B. Lippincott 

 Company. (Pp. viii + 294, with 70 illustrations.) Price 8s. bd. net. 



