296 APPENDIX 



" When the temperature of the mixture of liquid 

 oxygen and fluorine is allowed to rise slowly, the 

 oxygen evaporates first" (see text, p. 63). l This shows 

 there is an atomic or molecular selective power for 

 Ether a most important deduction. 



If a battery, an electric pile, be placed under condi- 

 tions that it cannot obtain Ether, that is immersed in 

 liquid oxygen, or oxygen molecules nearly devoid of 

 Ether, no electric current exists. 2 This tends to the 

 view that electricity is the motion of Ether (see text, 

 p. 54). 



Absolute alcohol submitted to the temperature of 

 liquid air is so robbed of Ether by the liquid air that 

 it becomes solid and hard ice, and will not ignite in 

 contact with the flame of a Bunsen burner. 3 



Photography is dependent upon chemical reaction, 

 induced by means of light. Now Prof. Dewar shows 

 that this reaction is suspended at low temperatures, so 

 that a sensitive bromide paper is " untouched by the 

 light." 4 This tends to the view that light is the 

 motion of Ether, or is the reaction of Ether on the 

 molecule. Now all these experiments negative the 

 dogma of the kinetic theory, and entirely support the 

 view enunciated in the author's work, " What is 

 Heat ?" and in pp. 53 to 66 and fig. 5 in the text. It 

 is absolutely impossible to overrate the importance of 



1 Idem, p. 182. 



2 Proceedings of the Royal Institution of Great Britain, vol. 

 xiv. No. 87, 1893, p. 11. " Liquid Atmospheric Air," by Prof. 

 Dewar. 



3 Idem, p. 12. 



* Proceedings of the Royal Institution of Great Britain, vol. xiv. 

 No. 89, 1896, p. 669. 



