SCIENCE-ADVERTISEMENTS 



New Zeiss Sugar Refractometer 



See Zeitschrift fur Instrumentenkunde, 1913, Heft 10. 



with scale in the field of the telescope reading directly in dry substance percentage 

 and with special arrangement for the reading of very dark fluids. 



This'instrument is distinctly less in price than the Abbe Refractometer with 

 special sugar scale heretofore in wide use. 



As constructed in'accordance with the suggestions of Herzfeld and Schonrock to 

 meet the requirements of the International Commission. 



Duty Free $ 75.90, net 



Send for Copy of above Reprint 



ARTHUR H. THOMAS COMPANY 



IMPORTERS AND DEALERS 



MICROSCOPES, LABORATORY APPARATUS AND CHEMICALS 



WEST WASHINGTON SQUARE 

 PHILADELPHIA 



