trk together, i am ranuiiar 

 !th, and can help you work 

 ir problems. Complete model 

 r experimental work. 



RICKJ.MAYWALD.F.C.S. 



NSULTING CHEMIST 

 , N«w York 

 IW John 



Founded 1837 



BOSTON, MASS. 



Inc. 



Mannlactarwa «l 

 DIVING DRESSES WADINQ Pi 



MOULDED GOODS CEMI 



UN VULCANIZED CimS OF ALL KINDi 

 Rubber ff ashed. Dried, Treated mnd Shi 



U. S. Pat. Off. 



Vol. LVI. No. 5. 



tW-PEf^^"" 



Reg. United Kingdom. 



Edited by HENRY C. PEARSON— Offices, No. 25 West 4Sth Street, NEW YORK. 



AUGUST 1. 1917 



35 CENTS. 



$3.00 Per Year. 

 $3.50 Abroad. 



"BUFLOVAK" 



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Let us tell you about them 



"Buflovak" Apparatus Includes 



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 Vacuum Drying and Impregnating Apparatus 



Dry Vacuum Pumps — Condensers 

 Reclaiming and Deresinizing Apparatus 



"Butlovak" Vacuum Rotary Dryer 



Buffalo Foundry & Machine Co. 



52 Winchester Ave. 

 BUFFALO, N. Y. 

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LAMPBLACKS ESPECIALLY FOR RUBBER MANUFACTURE 



SAMUEL CABOT, INC., BOSTON. MASS. 



V ISLAIMO 

 ELER 



R. J.CALDWELL CO.,Inc 



IVIILLS AT 

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