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I U O H- ^ *> 



SCIENCE 



New Series. 

 Vol. IX. No. 219. 



Friday, March 10, 1899. 



Single Copies, 15 cts. 

 Annual Subsckiption, 85.00- 



Queen Induction Coils 



The very extensive demand which we have had for X-Ray Apparatus has 

 afforded us a large experience in building Induction Coils and given us occasion 

 to make extensive experiments to perfect our line. Every detail of the coil has 

 received careful consideration and every part has undergone improvement. We 

 are prepared to furnish perfected types for all purposes. 



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Oiiiiii I > iji -^piiK Iiiiliiition < ml style A 

 SENT ON APPUCATION 



CATALOGUES 

 T Electrical Test Instruments (120 pages) 

 I Physical Apparatus (150 pages) 



I-aO Physical Laboratory Supplies (180 pages) 

 I-90 Commercial Elect. Instruments (48 pages) 



CIRCULARS 



214 Lord Kelvin's Elect. Instruments (20 pages) 



244 Cable Testing Apparatus (40 pages) 



264 Queen X-Ray Apparatus (24 pages) 



364 The Queen- Acme Testing Set (20 pages) 



QUEEN & CO., INC. 



NEW YORK BRANCH : 



59 Piftb Avenue 



Electrical and Scientific Instrument Works 



1010 Chestnut St., Philadelphia, u.s.a. 



