SCIENCE 



New Series. 



Vol. XII. No. 311. 



Friday, December 14, 1900. S!.°rsc',^tZ 



Annual SnascEipxioN, $6.00 



QUEEN INSTRUMENTS 



New • 

 Queen Wall Pattern 

 Galvanometer 



The Moving Coil in this Galvanometer is of small diameter and lightweight. It can be 

 made dead beat and will then give readings with much greater rapidity than other forms on 

 the market. When arranged for Ballistic work the period of swing can be made as desired. 



Physical Apparatus Induction Coils Electrical Testing Instruwents 



QUEEN & CO., Inc. 



J. G. GRAY, President 

 ELECTRICAL AND SCIENTIFIC INSTRUMENTS 



59 Fifth Avenue, New Yorl< ■^r\^r\ r>.i- a j. Ox oi--i -i i i ■ i-» 



480 Monon Bidg., Chicago 1010 Chcstnut St., Philadelphia, Pa. 



|^^0£C16)90(rl 



