xii CONTENTS 



XIII Joseph Priestley (1733-1804) 96 



THE DISCOVERY OF OXYGEN 



XIV Henry Cavendish (1731-1810) 102 



THE combination OF HYDROGEN AND OXYGEN 

 INTO WATER 



XV Sir William Herschel (1738- 



1822) 109 



THE DISCOVERY OF URANUS 



ON THE NAME OF THE NEW PLANET 



ON NEBULOUS STARS 



XVI Karl Wilhelm Scheele (1742- 



1786) 122 



THE CONSTITUENTS OF AIR 



XVII Antoine Laurent Lavoisier 



(1743-1794) 129 



THE NATURE OF COMBUSTION 



XVIII Alessandro Volta (1745-1827) 135 



NEW GALVANIC INSTRUMENT 



XIX Pierre Simon Laplace (1749- 



1827) 138 



THE NEBULAR HYPOTHESIS 



XX Edward Jenner (1749-1823) 148 



THE THEORY OF VACCINATION 



XXI Count Rum ford (1753-1814) 157 



THE NATURE OF HEAT 



XXII John Dalton (1766-1844) 166 



THE ATOMIC THEORY 



XXIII Marie Francois Xavier Bichat 



( 1771-1802) 168 



THE DOCTRINE OF TISSUES 



XXIV Amadeo Avogadro (1776-1856) 177 



THE MOLECULES IN GASES PROPORTIONAL TO 

 THE VOLUMES 



XXV Sir Humphrey Davy (1778- 



1829) 183 



ON some new phenomena OF CHEMICAL 

 CHANGES PRODUCED BY ELECTRICITY 



