your products not as good as 

 ight to be? Probably I can 

 ou how to make them right. 

 ;, anyway. 



ERICH J. MAYWALD, F.C.S. 



CONSULTING CHEMIST 



'Phone. 823 John New York 



BUYERS' DIRECTORY 73 



MARRY IVI. HOPE 

 ENGINEER 



141 MILK STREET BOSTOI 



Rubber Mill Engineering a Specialty 



l.\\ ESI 10 \ I loss 



Al'l'i: USA] s 

 STEAM POW BB PLANTS 



DESIGNS 

 > I • i:i 1 1 I. ' - 

 SUPERS ishi\ 



[I Al. [>IS I , 



%m-?t^ 



Edited by HENRY C. PEARSON— Offices, No. 25 West 45th Street, NEW YORK. 



Vol. LII. No. 2. 



MAY 1, 1915. 



35 CENTS. 



$3.00 Per Year. 

 $3.50 Abroad. 





EDWARD MAURER CO., Inc. 



80 Maiden Lane 



NEW YORK 



CRUDE RUBBER 



Guayule 



Gutta Percha 



Balata 



LAMPBLACKS ESPECIALLY FOR RUBBER MANUFACTURE 



SAMUEL CABOT, INC., BOSTON, MASS. 



