A TEXT-BOOK 



OF 



BACTEKIOLOGY 



INCLUDING THE 



ETIOLOGY AND PREVENTION 



OF 



INFECTIVE DISEASES 



AND A SHORT ACCOUNT OF 



YEASTS AND MOULDS, ELEMATOZOA, AND 

 PSOROSPERMS 



OF THE 



UNIVERSITY 

 ^^C^^H^/ 



BY 



EDGAE M. CEOOKSHANK, M.B. 



PROFESSOR OF COMPARATIVE PATHOLOGY AND BACTERIOLOGY, AND FELLOW OF KING** 

 COLLEGE, LONDON. 



FOURTH EDITION 

 RECONSTRUCTED, REVISED AND GREATLY ENLARGED 



PHILADELPHIA 



W. B. SAUNDEES 



925 WALNUT STREET 

 1897 



