Produced by Laura Wisewell, Turgut Dincer, Tamise Totterdell and the Online Distributed Proofreading Team at http://www.pgdp.net (The original copy of this book was generously made available for scanning by the Department of Mathematics at the University of Glasgow.) +--------------------------------------------------------------------+ | | | | | TRANSCRIBER'S NOTES: | | | | Mathematical expressions which are in italics in the original text | | are displayed in non-italic characters to increase the readability | | of the book. | | | | For super and subscripts unicode characters have been used except | | a few cases where carat symbol and underline have been used. | | | | Mathematical notation in the body of text is duly conserved but | | parantheses have been added to expressions to avoid any kind of | | misenterpretation. | | | +--------------------------------------------------------------------+ ENGLISH MEN OF SCIENCE EDITED BY J. REYNOLDS GREEN, Sc.D. LORD KELVIN ENGLISH MEN OF SCIENCE EDITED BY DR. J. REYNOLDS GREEN. _With Photogravure Frontispiece._ _Small Cr. 8vo, 2s. 6d. net per vol._ SPENCER. By J. ARTHUR THOMPSON. PRIESTLEY. By Dr. THORPE, C.B., F.R.S. FLOWER. By Prof. R. LYDEKKER, F.R.S. HUXLEY. By Prof. AINSWORTH DAVIS. BENTHAM. By B. DAYDON JACKSON, F.L.S. DALTON. By J. P. MILLINGTON, M.A. _J. M. DENT & CO._ _All Rights Reserved_ [Illustration: Lord Kelvin] LORD KELVIN _AN ACCOUNT OF HIS SCIENTIFIC LIFE AND WORK_ BY ANDREW GRAY LL.D., F.R.S., V.-P.R.S.E. PROFESSOR OF NATURAL PHILOSOPHY IN THE UNIVERSITY OF GLASGOW PUBLISHED IN LONDON BY J. M. DENT & CO., AND IN NEW YORK BY E. P. DUTTON & CO. 1908 RICHARD CLAY & SONS, LIMITED, BREAD STREET HILL, E.C., AND BUNGAY, SUFFOLK. PREFACE