CONTENTS 



M. R. Smirnow: Biological Variations of Bacteria. 1 385 



W. Whitridge Williams and Ward Burdick: A New Culture Medium for 



the Tubercle Bacillus 411 



Edward S. Good and Wallace V. Smith: Bacillus Abortus (Bang) as an 



Etiological Factor in Infectious Abortion in Swine 415 



T. L. Hills: The Relation of Protozoa to Certain Groups of Soil Bacteria. 423 



P. G. Heinemann and E. E. Ecker: A Study of the Boas-Oppler Bacillus. . 435 



J. M. Sherman: A Contribution to the Bacteriology of Silage 445 



Ward Giltner. Book Review: Laboratory Manual in General Micro- 

 biology 453 



Abstracts of American Bacteriological Literature: 



Bacteriology of Food 455 



Bacteriology of the Mouth 455 



Bacteriology of Soils 456 



Bacteriology of Water and Sewage 457 



Disinfection 459 



Immunology 461 



Industrial Bacteriology 463 



Medical Bacteriology 464 



Number one of volume one of the Journal of Bacteriology, dated January, 

 appeared April 22; number two, dated March, appeared May 17. 



The Journal of Bacteriology is issued bimonthly. Each volume will con- 

 tain approximately 600 pages. Subscriptions are taken only by the volume and 

 not by the year. 



The price of the Journal is $5.00 a volume for all points within the United 

 States and Canada; foreign subscriptions .S5.50 (23s). 



No claims for copies lost in the mails can be allowed unless such claims are 

 received within 30 iays of the date of issue. Claimants must directly state 

 that the publication was not delivered at their recorded address. "Missing from 

 files" is no proof of nonreceipt. The publishers will not be responsible for loss 

 due to change of address unless notification is received at least one week in advance 

 of issue. 



Fifty reprints of articles will be furnished to contributors free of cost when 

 ordered in advance. A table showing cost of reprints, with an order slip, is sent 

 with proof. 



Manuscripts should be sent to Prof. C.-E. A. Winslow, Yale Medical School, 

 New Haven, Conn. 



All other communications pertaining to editorial work should be addressed 

 to A. P. Hitchens, Glenolden, Pa. 



SUBSCRIPTIONS AND ADVERTISEMENTS 



United States and Canada. 



Subscriptions and correspondence concerning business matters should be 

 addressed to the Williams & Wilkins Company, 2419-21 Greenmount Avenue, 

 Baltimore, Md. 



Great Britain and British Dominions with the Exception of Canada 



Subscriptions from Great Britain and British dominions, with the exception 

 of Canada, and correspondence pertaining thereto, should be addressed to Mr. 

 C. F. Clay, Manager, Cambridge University Press, Fetter Lane, London, E. C. 



