

DEPARTMENT OE AGRICULTURE, 



NEW SOUTH WALES. 



SCIENCE BULLETIN, 0) December, 1921. 

 No. 21. 



THE CAUSE OF BLACK DISEASE AND 

 ITS METHOD OF TRANSMISSION. 



BEING FURTHER STUDIES IN A BRAXY-LIKE DISEASE 



OF SHEEP, 



SYDNEY DODD, D.V.Sc., F.R.C.V.S., 



Lecturer in Veterinary Pathology and Bacteriology, Veterinary School, 

 The University of Sydney. 



Workers in the respective branches of Economic Science covered 

 by this series of Science Bulletins will receive such of them as may 

 be of use in their special branches of study upon application to the 

 Under Secretary and Director, Department of Agriculture, Sydney. 



SYDNEY: WILLIAM APPLEGATC GULLICK. GOVERNMENT PR'INTER. 1921. 



