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SCIENCE 



NEW skr™ Friday, April 11,1919 ^^"^ o»^> '" <^ ^ ^ 



Vou XLJX, No. 1267 -T ' ' Ahmoai. tIpBSCBipnosi, (8.00 



Ne^w^ Blakiston Books 



W^ILEY — Beverages and their Adulterations 



By Harvey W. Wiley, M.D., Formerly Chief of Bureau of Chemistry, U. S. Department 

 of Agriculture. Author of "Foods and their Adulteration." 



From the Preface: The rapidly increasing use of fruit juices demands a prominent place in 

 this volume, for their description and composition. The many so-called soft drinks, which 

 will undoubtedly have a greater vogue as the area in which alcoholic beverages are manufac- 

 tured and sold decreases, warrant a rather full description of them here. The so-called medi- 

 cines which consist chiefly of alcohol, and which are held by the Bureau of Internal Revenue 

 as non-medicinal, but alcoholic, are fully described. 



Proper space is given to a discussion of coffee, and related products, tea, cocoa, chocolate. 

 Water with potable waters, mineral waters, artificial and natural, are included. With each 

 subject treated are described the common adulterations and misbrandings which may be prac- 

 ticed therewith. 42 Illustrations. 8vo. Pp. xv-f 421. Cloth, $3.50. 



MAXXED — Catalytic Hydrogfenation and 

 Reduction 



By Edward B. Maxted, Ph.D., B.Sc, F.C.S. 



It presents in accessible form the numerous examples of catalytic hj'drogenation which have 

 been published from time to time. Special attention has been given to experimental methods 

 and to simple hydrogenation of unsaturated linkages such as the conversion of ethylene to 

 ethane or of benzene to cyclohexane. Various catalytic reductions involving the splitting off 

 of water or a halogen acid are included, also a chapter on dehvdrogenation. 12 Illustrations. 

 Cloth, fl.25. 



^WILLO^WS and HATSCHEK— Surface 



Tension and Surface Energy 



Their' Influence on Cliemlcal Pbenomena 



By R. S. Willows, M.A., D.Sc, and Emil Hatschek. Second Edition, Revised. 21 

 Illustrations. Cloth, >1.50. 



GAQER — Laboratory Guide to General 



Botany second Edition! 



Bv C. Stdart GaGER, Director, Brooklyn Botanic Garden. Second Edition. 12mo. Pp. 

 x+206. Cloth, $1.00. 



P. BLAKISTON'S SON & CO. 



PUBLISHERS PHILADELPHIA 



