NA TURE [April 8, 1 8 



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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. i 2 mo, |J 



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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 Note: 

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Blowpipe Analysis. 



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Units and Physical Constants. 



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 An Introduction to the Theory of Electricity. 



Wi.h^numerous Examples. By Linm*us Cumming. MA. Second Edition, with Corrections and Additions. I2 mo 



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

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The Metaphysics of the School. 



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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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