TWO SECTIONS— SECTION I. 



"QUAKER" WHITING 



ViCVIMDI 



I 



so EAST 42nd STREET 

 MEW YORK 



MINERAL RUBBER 



LET ME SOLVE YOUR PROBLEM? 



I have helped others to solve theirs; 



no doubt I cjui help you too. Practical 



experience and chemical knowledere go 

 hand in h2uid. 



FREDERICK J. MAYWALD, F.C.S. 



Rubber Chemist 



K PARK PLACE NEWARK, N. J. 



Analyses, TesU, Experimental Work 



ALFRED hale: RUBBER CO 



Incorporated 1900 ATLANTIC. MASS. Founded 183, 



Reliable Rubber Goods 



MOLDED GOODS 



CRUDE RUBBER STANDARDIZED 



RUBBERIZING OF FABRICS 



Reg U. S. Pat. Off. 



Vol. LXIII. No. 1 



JGutta-PehcH'' 



Edited by HENRY C. PEARSON 



Reg. United Kingdom 



OCTOBER I, 1920 



35 CENTS |3°° P" Year. 



$3.50 Abroad. 



Avoid Oxidation and Overheating by Using "Buflovak" Vacuum Dryers 



The high vacuum and low temperature of "Buflovak" Dryers absolutely prevent over-heat- 

 ing and oxidation, which are constant dangers to rubber when exposed to high tmperature or 

 oxygen while drying. Other advantages are economy of drying time and reduced labor cost. 



"Buflovak" Vacuum Dryers dry all kinds of sheet rubber, rubber 

 compounds, etc. 



Profit by the experience of others and get all the facts before de- 

 ciding on your drying equipment. 



We build a com- 

 plete line of Va- 

 cuum Dryers, 

 Evaporators and 

 Chemical Appa- 

 ratus. 



-m> 



"Buflovak" Vacuum Shelf Dryer 



"Buflovak" Rotary Dryer 



Buffalo Foundry & Machine Co. 



1577 Fillmore Ave., Buffalo, N. Y. 



New York Office: 17 BATTERY PLACE 



I'asSS.A^SaS" 





0. > 



LAMPBLACKS ESPECIALLY FOR RUBBER MANUFACTURE 



SAMUEL CABOT, INC., BOSTON. MASS. 



^tered a. .econd-cla.. matter Octob^ 4. 18W, .. the p..t office at New York, N V ..,.., ,U. >.. -. u-ynZ- 



