NATURE [April i, ij 



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Tbe Mechanical Theory or Heat. 



By R. Clausius. Translated by Walter R. Browne, M.A., late Fellow of Trinity College, Cambridge. i2mo, (7 



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With a Catalogue of Twelve Hundred Double Stars and Extensive Lists of Meas 

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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 No 

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Blowpipe Analysis. 



By J. Landauer. Authorized English Edition, by James Taylor and William E. Kay. l6mo, $1.50. 



Units and Physical Constants. 



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An Introduction to the Theory of Electricity. 



With numerous Examples. By Linnseus Cumming, M.A. Second Edition, with Corrections and Additions. 12: 



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

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The Metaphysics of the School. 



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



The Electrical Researches of the Hon. Henry CaTendlsh, 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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A Treatise on the Mathematical Theory of the Motion of Fluids. By Horace Lamb, M.A., Professor ot Maihemaiii 

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