SCIENCE 



New Series 



Vol. LIV, No. 1392 



Friday, September 2, 1921 



Single Copies, 16 Cts. 

 Annual Subsokiption, 86.00 



RECENTLY IS. 



Smith's Bacterial Disec%^^> of Plants 



%^ . 



" There are many unique features about this book % is the first treatise of 

 its kind, a product of the author's own researches, . ^ fills a need that was 

 rapidly becoming urgent. Its author is an authot ^'^ i the subject. The 

 style is easy and tremendously interesting. The sug^ % ^ '*s given throughout 

 are practicable — they have been thoroughly tried — an^-%'3> Nints on the details 

 of technic will prove serviceable. The book is adapta\"^ -lO the use of either 

 the graduate or the undergraduate student." — L. R. Hesler in "Phytopathology." 



By Erwin F. Smith, in charge of Laboratory of Plant Pathology, Bureau of Plant Industry, 

 Washington, D. C. Octavo of 688 pages, illustrated. Cloth, §io.oo net. 



Prentiss and Arey's Embryology j.™ 



This edition has been given a thorough and careful revision, adding every new 

 advancement. It deals particularly with the chick and pig embryos usually 

 studied in the laboratory, comparing them constantly with the human embryo 

 and giving you a concise, systematic account of human embryology. A large 

 number of original dissections are described and illustrated. 



Large octavo of 411 pages, with 388 illustrations. By Charles W. Prentiss, Ph.D., formerly 

 Professor of Microscopic Anatomy, and Leslie B. Arey, Ph.D., Professor of Anatomy, North- 

 western University. Cloth, I5.50 net. 



Seventh 

 Edition 



This work gives the technic of bacteriologic methods, bacteriology of various 

 diseases, histologic methods, the special methods used in clinical bacteriology 

 and pathology, and the preparation of bacterial vaccines. 



Octavo of 555 pages, with 181 illustrations. By Frank Burr M.^llory, M.D., Pathologist to 

 the Boston City flospital; and James Homer Wright, M.D., Pathologist to the Massachusetts 

 General Hospital. Cloth, I4.75 net. 



Mallory and Wright's Pathologic Technic 



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Please send me the books marked (X), charging the amount to my account: 



Smith's Bacterial Diseases of Plants .... Cloth, ^10.00 net 



Prentiss and Arey's Embryology Cloth, ^5.50 net 



Mallory and Wright's Pathologic Technic . . Cloth, ^4.75 net 



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