Vol. 21. JUNE 1889. No. 169. 



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FIFTH SERIES. 



N° 169.— JUNE 1889. 



WITH TWO PLATES. 



Illustrative of Messrs. Eowland and Hutchinson's Paper on the Elecfcro- 

 magnetic Effect of Convection-Currents, and Mr. A. Blttt's on the 

 prot Me Cause of the Displacement of Shore-lines. 



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