ONE OUNCL '|i'> 



HFIED PYROXn 



'III ;SHREDS IMMERSED IN WTtB t 



illllW;'' V..-, .- --.-,,. .,.<i»lW'«*S 



P«f*ut,.„ CELLOIOIN .--, c<»'«''"'':„i 



ipStOlREiN ACOOL DARKPL^f'- 

 If^LlillHCKRODT CHEMICAL W*'!' 



PURIFIED PYROXYLIN 



(Celloidin) 



WE offer this highly purified preparation of 

 PYROXYLIN for use in pathological labora- 

 tories for embedding specimens, preparing pure sur- 

 gical Collodion, and for all other purposes for which an 

 exceptionally pure Pyroxylin is required. 



M.C.W. PURIFIED PYROXYLIN is supplied in 

 the form of shreds, put up in 1-oz. glass stoppered 

 bottles, immersed in water. It is non-explosive and 

 perfectly safe to ship and handle. 



MALLINCKRODT CHEMICAL WORKS 



ST. LOUIS :: :: :: NEW YORK 



Manufacturers of High Grade Medicinal Chemicals 



THE JOURNAL OF IMMUNOLOGY 



Official Organ of the Society of Serology and Hematology and the American 

 Association of Immunologists 



THE JOURNAL OF CANCER RESEARCH 



Official Organ of the American Association for Cancer Research 



THE JOURNAL OF BACTERIOLOGY 



Official Organ of the Society of American Bacteriologists 



Subscription price: $5.00 a volume 



Order from 

 WILLIAMS & WILKINS COMPANY 



2419-21 Greenmount Avenue 

 BALTIMORE, U. S. A. 



