NATURE {January 8, 188c 



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The Mechanical Theory of Heat. 



By R. Clausius. Translated by Walter R. Browne, M.A., late Fellow of Trinity College, Cambridge. i2mo, |2.6o. 



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Studies on Fermentation. 



The Diseases of Beer. Their Causes and the Means of Preventing them. By L. Pasteur. A Translation, with Notes, 

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Blowpipe Analysts. 



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Units antl Physical Constants. 



By J. D. Everett, M.A., D.C.L., F.R.S., etc., Professor of Natural Philosophy in Queen's College, Belfast. i6mo; fi.io. 

 {An Introduction to the Theory of Electricity. 



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A History of the Principal Drugs of Vegetable Origin met with in Great Britain and British India. By Friedrich'A. 

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The Metaphj *i<-N of the School. 



By Thomas Harper, S.J. 8vo, $5. 



The Electrical Researches of the Hon. Henry Cavendish, F.R.S. 



Written between 1771 and 1781. Edited from the original ms. by J. Clark Maxwell, F.R.S. 8vo, $5. 



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