14 SCIENCE AND PHILOSOPHY. 



Elementary Treatise on Natural Philosophy. By A. PHIVAT DKSCIIA- 

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Natural Philosophy for General Readers and Young- Persons. 

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Theory of Heat. By J. CLERK MAXWELL. ICmo. Cloth, $1.50. 



Nature and L.ife. Facts and Doctrines relating to the Constitution of Matter, 

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The Nature of Li&amp;lt;i~ht, v/ith a General Account of Physical Optics. 

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