SCIENCE 



vn^ fm^Nn ,.7. Friday, April 29, 1921 ^ ^,^^ '«. '« c™ , „ 



Vol, LIII, No. 1374 ' > A: (» P cription, $6.00 



RECENTLY ISSUED .^ ^ 



Smith's Bacterial Diseases of PL ^ 



" There are many iinique features about this book. It is the first t\ % 

 of its kind, a product of the author's own researches, and it fills a\ % 

 that was rapidly becoming urgent. Its author is an authority on the 1- 

 ject. The style is easy and tremendously interesting. The suggestions 

 given throughout are practicable — they have been thoroughly tried — and 

 the hints on the details of technic will prove serviceable. The book is 

 adaptable to 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, WashingtoD, 

 D. C. Octavo of 600 pages, illustrated. Cloth, $10.00 net. 



Prentiss and Arey's Embryology Edition 



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 ofJyjmaij,_ 

 embryology. A large number of original dissections are de^efibe^ofliMi /, '' 

 illustrated. / c^^^ "'//, 



Large octaTO of 411 pages, with 388 illustrations. By Charles W. Prentiss, Ph.D , ftmerly Professor of 

 Microscopic Anatomy , and Leslie B. Arey, Ph.D., Associate Professor of Anatomy, NomwestetB Pin-iversity. 



Mallory and Wright's Pathologic Technic \^ fdwon 



TTiis work gives the technic of bacteriologic methods, bactericJlogy <SlllseUj|!, 

 various diseases, histologic methods, the special methods used in clinicaT""' 

 bacteriology and pathology, and the preparation of bacterial vaccines. 



Octavo of 565 pages, with 181 illustrations. By Frank Burr Mallory, M.D., Pathologist to the Boston City 

 Hospital; and James Homer Wright, M.D., Pathologist to the Massachusetts General Hospital. 



Cloth, $4.75 net. 



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Please send me the bookt marked (X), charging the amount to my accouni : 



Smith's Bacterial Diseases ot 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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