INTERNATIONAL 

 CENTRIFUGES 



Latest model, self -balancing cen- 

 trifuge with brake and brush re- 

 lease, and removable top adapted 

 to use with perforated basket. 



International Equipment Co. 



352 Western Avenue (Brighton) 

 Boston 35, Mass. 



Catalogue Cy sent on Request 



THE JOURNAL 



OF 



CANCER RESEARCH 



The oflScial organ of the 

 American Association for Cancer Research 



WILLIAM H. WOGLOM 



Editor 



The Journal is of interest from the practi- 

 cal and theoretical standpoints. 



Five dollars a volume — United States and 

 Canada. Five dollars and fifty cents else- 

 where. 



Order from 



WILLIAMS & WILKINS CO. 



Baltimore, U. S. A. 



Microscopes 



Photo-Micrographic and 

 Projection Apparatus 

 Refractometers 

 Interferometers 

 Spectroscopes 

 Opto Medical Apparatus 

 Haemacytometers 

 Photo Lenses 

 Field Glasses 

 Surveying Instruments 

 Telescopes 



Immediate delivery from stock. 

 Catalogs for any of the instruments 

 enumerated, supplied upon request. 



wum 



JEIN A 



-y 



HAROLD M. BENNETT 



U. S. AGENT 



153 West 23d St. New York City 



