SCIENCE 



New Series t on moo Single Copies, 15 Gts. 



Vol. LV, No. 1435 b BIDAY, JUNE ciU, iJ^J, Annual Subscription, Jfi.OO 



Saunders' Books 



Wells' Chemical Pathology edition 



Tlifs work considers pathology from the standpoint of the chemical processes involved. It 

 deals with the chemical changes that take place in pathologic conditions. It treats of the 

 causes of disease and so provides the first step in their treatment. 



Octavo of 695 pages. By H. GIDEON WELLS, M.D., Ph.D., Professor of Pathology, University of Chicago. 



Cloth, $7,00 net. 



Jordan's General Bacteriology edition 



In this work there are extensive chapters on methods of studying bacteria, including stain- 

 ing, biochemical tests, cultures, etc; on development and composition of bacteria; on enzymes 

 and fermentation products ; on the bacterial production of pigment, acid, and alkali ; and on 

 ptomains and toxins. 



Octavo of 744 pages, illustrated. By EDWIN O. JORDAN, Ph.D., Professor of Bacteriology in the Uni- 

 versity of Chicago. Cloth, $5.00 net. 



Smith's Bacterial Diseases of Plants 



This book is the result of thirty-five years of reading and diligent laboratory and field in- 

 vestigation. It is largely the product of a single laboratory, eight of the organisms here 

 selected for special study having been named by the author. 



By ERWIN F. SMITH, in charge of Laboratory of Plant Pathology, Bureau of Plant Industry, Washing- 

 ton, D. C. Octavo of 688 pages, illustrated. Cloth, $10.00 net. 



Whetzel's History of Phytopathology 



Professor Whetzel divides his subject into Five Eras, and these in turn into Periods. He 

 gives a general survey of each Era and each Period, crystallizes the evolutionary movement 

 of each, gives interesting biographic sketches of the predominant figures, freqiiently includ- 

 ing portraits. 



12mo of 130 pages. By HERBERT RICE WHETZEL, Professor of Plant Pathology at Cornell University, 

 Ithaca, New York. Cloth, $2.00 net. 



Heineman on Milk 



Tliis work discusses milk from the viewpoint of the sanitarian, producer, and physician. 

 There are chapters on the physiology of lactation, chemical, physical, and bacteriologic ex- 

 aminations, contamination, fermented milks, pasteurization, certified milk, economic aspect 

 of production and distribution, etc. 

 By PAUL G. HEINEMAN, M. D., Wisconsin. Octavo of 684 pages, illustrated. Qoth, $7.00 net. 



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Wells' Chemical Pathology__. $7.00 net. Smith's Bacterial Diseases of Plants $10.00 net. 



Jordan's General Bacteriology $5.00 net. Whetzel's History of Phytopathology— _$2.00 net. 



I" f Heineman's Milk ^$7.00 net. 



