A TEXT-BOOK 



LIBRARY. 



BACTEEIOLOG 



INCLUDING THE 



ETIOLOGY AJSD PREVENTION 



II^FEOTIVE DISEASES 



AND A SHOET ACCOUNT OF 



YEASTS AND MOULDS, H^MATOZOA, AND 

 PSOROSPERMS 



EDGAR M. CROOKSHANK, M.B. 



I'KOFESriOK OF COMPAEATnE PATHOLOGY AND BACTERIOLOGY, AND FELLOW OF KING'S 

 COLLEGE, LONDON 



FOURTH EDITION 

 RECOKSTRUCTED, REVISED AND GREATLY ENLARGED 



PHILADELPHIA 



W. B. SAUNDERS 



925 Walnut Sthbbt 

 1897 



