Vol. 12. NOVEMBER 1881. No. 76. 



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THE 

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FIFTH SERIES] 5 °-<%y 

 N° 76.— NOVEMBER 188k;* 



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Illustrative o£ M. Henri Becquerel's Paper on Experimental Investi- 

 gations on Magnetic Rotatory Polarization in Grases, and Mr. Grant's 

 on Curves of Electromagnetic Induction. 



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