LIVES OF THE ELECTRICIANS. LIVES OF THE ELECTRICIANS: PROFESSORS TYNDALL, WHEATSTONE, AND MORSE. FIRST SERIES. BY WILLIAM T. JEANS. “The electric telegraph is the most precious gift which Science has given to civilisation.”--SIR D. BREWSTER. LONDON: WHITTAKER & CO., 2, WHITE HART STREET, PATERNOSTER SQUARE, E. C. GEORGE BELL & SONS, YORK STREET, COVENT GARDEN. 1887. RICHARD CLAY AND SONS, LONDON AND BUNGAY. CONTENTS. INTRODUCTION. Use of lives of electricians--World-wide distribution of electricians--Eminent authorities on biographical studies _Pages_ ix-xvi _PROFESSOR TYNDALL._ CHAPTER I. Position as a scientist--Origin and early career--Work on Ordnance Survey, and as a teacher--Student life at Marburg-- Sense of duty and early friendships _Pages_ 1-20 CHAPTER II. Subjects of study in Germany--Discovery of diamagnetism-- Investigation of it--Scientific acquaintances--Early connection with Royal Institution--Slaty cleavage--Glacier phenomena explained _Pages_ 21-41 CHAPTER III. Researches on Radiant Heat--Aqueous vapour and new glacial theory--Calorescence--Formation of clouds--Germ theory--Smoke respirator--Experiments on sound and its production by heat _Pages_ 42-59 CHAPTER IV. Alpine travels--Ascent of Monte Rosa, Mont Blanc, Weisshorn, Col-du-Géant, and Piz Morteratch--Visit to Vesuvius--An American’s impressions--Visit to America--Exploration of Niagara Falls--Presidental address to British Association _Pages_ 60-83 CHAPTER V. Changes at Royal Institution--Development of electricity explained--Experimental illustrations and anecdotes--Reminiscences of Thomas Carlyle--Scientific adviser to the Trinity House _Pages_ 84-104 _PROFESSOR WHEATSTONE._ CHAPTER I.