SCIENCE— ADVERTISEMENTS 



Oil Distilling Apparatus 



ace. to Engler for the 

 distillation of mineral 

 oil and determination 

 of the boiling point. 



ABEL PENSKY 



PENSKY-MARTENS 



Flash 

 Point 

 Testers 



UBBELOHDE 



Drop Point Apparatus 



Viscosimeters and a 

 variety of other Oil 

 Testing Apparatus. 



RoHDE Laboratory 

 Supply Co. 



17 Madison Avenue New York, N. Y. 



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