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SCIENCE 



Niw BiBin 



Vol. XLVU No. 1222 



Friday, May 31, 1918 



SINOLI COFIES, 16 On. 

 Annual Subsoription, t6.M 



Whetzel's 

 History of Phytopathology 



In this new book Prof. Whetzel sets forth in rather comprehensive outUne 

 the outstanding features in the evolution of the science of plant pathology. 

 He divides his subject into five Eras — The Ancient Era (from earliest times 

 to end of 5th century); The Dark Era (6th to 16th centuries inclusive); 

 The Premodern Era (1600 to about 1850); The Modern Era (1853 to about 

 1906) ; The Present Era (1906 — ). These Eras he in turn divides into 

 Periods. He gives a general survey of each Era and each Period, crystal- 

 lizes the evolutionary movement of each ; gives interesting biographic 

 sketches of the predominant figures, frequently including portraits, and at 

 the end of each Period adds a concise summar3\ Bibliographic references 

 are numerous. Indeed the literature is here largely brought together for 

 the first time. 



12mo of 130 pages, with portraits. By Herbert Hice Wbetzel, Professor of Plant Pathology, Cornell 

 University, Ithaca, New York. 



Fred's Soil Bacteriology 



Laboralory Manual of Soil Bacteriology. 

 By E. B. Fred, Pli.D., .Associate Professor 

 of Agricultural Bacteriology, College of 

 Agriculture, Univei'sity of Wisconsin. 12mo 

 of 170 pages, illustrated. Cloth, fl.25 net. 

 Particularly valuable to students of soil 

 bacteriology, chemistry, physics, plant path- 

 ology. 



Kaupp's Poultry Culture 



Poultry Culture, Sanitation, Hygiene. By 

 B. F. Kaupp, M.S., D.V.M., Poultry Inves- 

 tigator and Pathologist, North Carolina 

 Experiment Station. 12mo, 418 pages, 19" 

 illustrations. Cloth, f2.00 net. 



Every side from names and breeds, to care 

 and marketing. 



Dietrich's Live Stock 



Livestock on the Farm. By William Diet- 

 KICH, Ph.D., Head of the Department of 

 Animal and Dairy Husbandry, University 

 of Minnesota, Crookston Branch. 12mo of 

 269 pages, illustrated. Cloth, $1:50 net. 



A clear presentation of economic livestock 

 raising. 



Hadley's The Horse 



The Horse in Health and Disease. By 

 Frederick B. Hadley, D.V.M., Associate 

 Professor of Veterinary Science, University 

 of Wisconsin. 12mo of 260 pages, illustra- 

 ted. Cloth, $1.50 net. 



Widely used in agricultural and veterinary 

 schools. 



W. B. SAUNDERS COMPANY Philadelphia and London 



