PROTOPLASM; 



ITS ORIGIN, VARIETIES,' AND 

 FUNCTIONS. 



BY 



JOHN W. HAYWARD, M.D. 



Author ef several Works on Medicine, Sanitation, House-building and 

 Hospital Construction, &*c. 



BRISTOL: JOHN WRIGHT & CO. 



LONDON: SIMPKIN, MARSHALL, HAMILTON, KENT & CO., LTD 

 LIVERPOOL: THH LIVERPOOL BOOKSELLERS' CO., 70, LORD ST. 



1902. 





