SCIENCE 



Friday, November 9, 1900. 



Single Copies, 15 CTS. 

 Annual Subscription, 85.00 



QUEEN INSTRUMENTS 



The Queen Ayrton Universal Shunt Box 



The Queen Ayrton Universal Shunt Box 



POSSESSES THE FOLLOWING DESIRABLE FEATURES: 



Shunt Values hold good regardless of Galvanometer Resistance. »'f^'^' ■ 



Shunt Values hold good when used with Ballistic Galvanometer. ;'"|' 



Variation in Temperature produces no error. 



Positive Contact by using Plugs. {Sliding contacts are treacherous.^ 

 Engraved Lines show interior circuits. 

 Polished Hard Rubber Top and Compact Form. 

 Excellent Workmanship and Accurate Adjustment. 



You are requested to ask for Circular 500 m which is given a full description of this and other New 

 Instruments. 



Induction Coils Physical AppARflius Electrical Testing Instruments 



QUEEN & CO., Inc. 



J. G. GRAY, President 



59 Fifth Avenue, New York 

 480 Monon BIdg., Chicago 



1010 Chestnut St, Philadelphia, Pa. 



