SCIENCE 



HBwBraim Friday May 15, 1914 single copim, is c™ 



TOL.XXXIX. No. 1011 TKIUAY, iVXAI ±c», ie-il ASWHAL BuBSoaiTnoM. $6.90 



THE TIFFANY 

 LABORATORY MOTOR 



A most reliable and serviceable motor for stirring and shaking appara- 

 tus, and other laboratory purposes requiring a small amount of power. 

 The speed may be varied at will from 100 to 1800 r.p.m.; no rheostat 

 or other current wasteful means required to vary the speed. A rachet 

 arrangement permits of the motor and pulleys being turned and held 

 securely at any angle desired. 



For 110 volts D.C. or A.C., Net, $7.00 y^^o^'^niTs^^ . 



EIMER ,-AND.. AMEND 



Headquarters for Laboratory Supplies 



205=211 Third Avenue NEW YORK CITY 



