CONTENTS. Xlii 



Page 



Its protective power imputable to aggregation chloride of nitrogen, 

 iodine of nitrogen binoxide of nitrogen oxygen extinguishes 

 combustion. Equality of expansion of gases rays of light simi- 

 larly effected . . . . . . .103 



Effect of proportion Phosphuretted hydrogen gas with chlorine 

 colour of light Phosphorus Phosphuretted azotic gas Oxygen 

 combined with sulphur Nitrous oxide Mineral acids and oils 

 their analysis. Dr. Ure ..... 104 



Influence of light on vegetation Aliment of plants Carbon derived 



from light How? Vegetation in the absence of light . . 105 



Latent heat Various authorities Temperature of the lungs Latent 



light Water . . . . . .106 



Voltaic polar determination Oxygen, hydrogen, and nitrogen, how . 

 determined to the respective electrodes . . .107 



In analysis of the brain Phosphorus a constituent Qualities (intellec- 

 tual) proportional . . . . . .108 



Glow-worm, pyrosoma atlantica, production of light without sensible 

 heat Combustion of phosphorus prevented by minute mixtures of 

 gas ....... 109 



Transition of fixed into radiant matter Experiment of MM. Fourcroy, 

 Vauquelin, and Seguin, on oxygen and hydrogen Deficiency in 

 result Confutation of direct transfer from fixation to radiancy . 110 



On the metals Hydrogen radiant Proof by colour of light, afforded 

 by Backhoffner's electro-magnetic machine, and Professor Daniel's 

 battery ..... .111 



Predicate analysis, and speculative hypothesis of composition of metals 112 



Positive electricity Red ray Oxygen Red light, produced from 

 positive electricity Identity of red ray of solar light, with positive 

 electricity and oxygen . . . . .113 



Theories, how formed Dr. Lardner's cyclopedia course selected in 



the theory submitted . . . . .114 



Mr. Cross's experiments Productive of great benefit Sceptical objec- 

 tions on the formation of animalculse absurd Animation in corro- 

 sive media supports the theory now proposed . . 115, 116 



Revealed religion supported by science Bacon, Rev. Dr. Wiseman. 117 



Experiments proposed . . . . .118 



First subject. Electrical state of the atmosphere, at stations and 



periods prescribed. 

 Second. Electricity positive and negative, with the gases With 



conductors and medice (various), noting: colour and effects. 



