28. The Origin of Life. Being an Account of Experiments with Certaiu 

 Superheated Saline Solutions in Hermetically Sealed Vessels. By H. 

 CHARLTON BASTIAN, M.D., F.R.S., Emeritus Professor of the Princi- 

 ples and Practice of Medicine, University College, London ; Author of 

 '* The Nature and Origin of Living Matter," " The Evolution of Life," 

 etc. 8vo. With 10 Plates Containing 6l Illustrations from Photo- 

 micrographs. $1.50 net. 



u This most noteworthy and compelling book. . . . The question both as to 

 che supposed origin of life once and for all, and also as to the supposed impassable gap of 

 to-day is surpassed in interest by nothing in the whole range of physical sciences ; if, 

 indeed, there be any to equal it whether in interest or in moment for our philosophy." 



The Morning Post. 



29. The Bacillus of Long Life. A Manual of the Preparation and 

 Souring of Milk for Dietary Purposes ; Together with an Historical 

 Account of the Use of Fermented Milks from the Earliest Times to the 

 Present Day, and their Wonderful Effect in the Prolonging of Human 

 Existence. By LOUDON M. DOUGLAS, F.R.S.E. 8vo. With 56 

 Illustrations. $1.50 net. 



This book has been designed with a view to meet an extensive demand for definite 

 data on the subject of Soured Milks. The author has had this matter brought before 

 him, times without number, by those inquiring for authentic information on the subject, 

 and he has therefore considered it desirable to gather together such information as is 

 available in connection with ancient and modern practice. He has endeavored to pre- 

 sent this to the reader in concise form. 



30. The Social Evil. With Special Reference to Conditions Existing 

 in the City of New York. A Report Prepared in 1902 under the Di- 

 rection of the Committee of Fifteen. Second Edition Revised with 

 New Material Covering the Years 1902-191 1. Edited by EDWIN R. A. 

 SELJGMAN, LL.D., McVickar Professor of Political Economy in 

 Columbia University. 8vo. $f.?5 net. (By mail^ $1.95.) 



A study that is far from being of merely local interest and application. The prob- 

 lem is considered in all its aspects and, for this purpose, reference has been made to 

 conditions prevailing in other communities and to the different attempts foreign cities 

 have made to regulate vice. 



31. Microbes and Toxins. By ETIENNE BURNET, of the Pasteur In- 

 stitute, Paris. With an Introduction by Elie Metchnikoff, Sub- 

 Director of the Pasteur Institute, Paris. With about 71 Illustrations. 



In preparation * 



The Invisible Spectrum. By Professor C. E. MENDENHALL, University 



of Wisconsin. 

 The Physiology and Hygiene of Exercise. By Dr. G. L. MEYLAN, 



Columbia University. 



Other volumes to be announced later 



