XX 



LIST OF ILLUSTRATIONS 



Louis Joseph Gay-Lussac 

 Alexander von Humboldt 

 Humphry Davy . 

 Jacob Berzelius . 

 Thomas Young . 

 Josef Fraunhofer 

 Augustin Fresnel 

 Hans Christian Oersted 

 Pierre Simon Laplace 

 Andre Marie Ampere 

 Sadi Carnot 

 Georg Simon Ohm 

 Karl Friedrich Gauss 

 Michael Faraday 

 Wilhelm Weber . 

 Julius Robert Mayer 

 John Tyndall 

 James Prescott Joule 

 Hermann Helmholtz 

 Lord Kelvin 

 Rudolf Clausius 

 Carl Linnaeus . 

 Charles Darwin . 

 JoHANN Mendel . 

 GusTAv Kirchhoff 

 Robert Bunsen . 

 Wilhelm Hittorf 

 James Clerk Maxwell 

 William Crookes 

 Josef Stefan 

 ludwig boltzmann 

 Heinrich Hertz . 

 Friedrich Hasenohrl 



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