Vol.7. MARCH 1879. No. 42. 



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FIFTH SERIES. 



N° 42.— MARCH 1879. 





THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE, 



AND 



JOURNAL OF SCIENCE. 



Being a Continuation of Tilloclis 'Philosophical Magazine? 

 Nicholsons 'Journal? and Thomsons 'Annals of Philosophy.'' 



WITH TWO PLATES. 



Illustrative of Prof. J. Trowbridge's Paper on the Methods of Measu- 

 ring Electric Currents of great Strength, MM. Kundt and Ront- 

 gen's on the Electromagnetic Rotation of the Plane of Polarization 

 of Light in the Vapour of Sulphide of Carbon, and Prof. A. Stein- 

 hatjser's on Binaural Audition. 



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