xiT SCIENCE— ADVERTISEMENTS 



New^ Spencer 

 Abbe Refractometer 



Range of indices 1.30 to 1.71 



The index scale is graduated in both directions to be read from 

 either side. Readings are direct in Indices of the D Hne. 



The mirror slides on a horizontal bar which greatly facilitates ob- 

 taining light from various positions. 



Among other substances it is suitable for examination of waxes, 

 sugar solutions, lard, oils, gums, balsams, varnish, etc. 



Description sent on request 



PAL2 COMPANY 



LABORATORY APPARATUS 



153-15T WEST 38i> STREET NEW YORK, N. Y. 



