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ON FORMS OF WATER, in Clouds, Rivers, Icei, and Glaciers. 

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HEAT AS A MODE OF MOTION. New edition. 12mo. 

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ON SOUND: A Course of Eight Lectures delivered at the Royal 

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FRAGMENTS OF SCIENCE FOR UNSCIENTIFIC PEO- 

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LIGHT AND ELECTRICITY. 12mo. Cloth, $1.25. 



LESSONS IN ELECTRICITY, 18'75-"76. 12mo. Cloth, $1.00 



HOURS OF EXERCISE IN THE ALPS. With Illustrations. 

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FARADAY AS A DISCOVERER. A Memoir. 12mo. Cloth, 



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CONTRIBUTIONS TO 3IOLECULAR PHYSICS in the Do- 

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SIX LECTURES ON LIGHT. DeUvered in America in 18*72- 

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