THE BACTERIOLOGY OF MILK. By 



HAROLD SWITHINBANK, of the Bacteriological Research 

 Laboratory, Durham, and Sir GEORGE NEWMAN, M.D., 

 F.R.S.E., D.P.H., Chief Medical Officer, Board of Educa 

 tion. With Special Chapters also by Dr. NEWMAN on Spread 

 of Disease by Milk and the Control of the Milk Supply. 

 With numerous Illustrations. Royal 8vo. 255. net. 



' Ought to find a place in the library of every medical officer of health 

 and of every milk-producer. Scientific in method and lucid in exposition, 

 the authors have given us a really invaluable text-book. . . . We are glad 

 to commend this book as one of the most valuable of recent English contri 

 butions to the science of public health.' Spectator. 



BACTERIOLOGY AND THE PUBLIC 



HEALTH. By Sir GEORGE NEWMAN, M.D., F.R.S. 

 Edin., D.P.H., Chief Medical Officer, Board of Education. 

 With numerous Illustrations. Medium 8vo. 215-. net. 



4 The present work, though nominally a third edition of " Bacteria in 

 Relation to the Economy of Nature, Industrial Processes and the Public 

 Health," is virtually a new book, written with the object of supplying all that 

 is necessary for the student of hygiene and the officer of health to know, so 

 far as every-day problems of sanitation and preventive medicine demand. 

 . . . Dr. Newman has done a good work in producing a treatise which 

 places at the service of the community what is known about all these topics.' 

 Daily Telegraph. 



THE RECENT DEVELOPMENT OF 



PHYSICAL SCIENCE. By W. C. D. WHETHAM, 

 M.A., F.R.S. Illustrated. Large Crown 8vo. 5*. net. 



THE PHILOSOPHICAL BASIS OF PHYSICAL SCIENCE THE LIQUE 



FACTION OF GASES AND THE ABSOLUTE ZERO OF TEMPERATURE 



FUSION AND SOLIDIFICATION THE PROBLEMS OF SOLUTION THE 

 CONDUCTION OF ELECTRICITY THROUGH GASES RADIO-ACTIVITY 

 ATOMS AND ^ETHER ASTRO-PHYSICS INDEX. 



RECENT ADVANCES IN THE STUDY 

 OF VARIATION, HEREDITY AND 



EVOLUTION. By ROBERT H. LOCK, M.A., Fellow 

 of Gonville and Caius College, Cambridge. With Portraits 

 and other Illustrations. Crown 8vo. $s. net. 



