S76 



Analyses of Books. 



In the second division Sir Humphry Davy treats of what he 

 calls radiant or ethereal matter. He considers it as producing 

 h'ght, as producing heat ; and enters into some refined specula- 

 tions respecting the conversion of terrestrial bodies into light, 

 and vice versa ; speculations winch I avoid examining, because 

 they do not admit either of proof or refutation ; and though 

 highly ingenious, treat, I fear, of subjects which will ever remain 

 beyond the reach of the human faculties. 



The third division is dedicated to the description of undecom- 

 pounded supporters of combustion. These are two, oxygen gas 

 and chlorine or oxymuriatic acid. The description of the pro- 

 perties of both is minute, and, as far as I can judge, very accu- 

 rate j but not susceptible^ from their very nature, of abridg- 

 ment. 



The fourth division treats of the simple combustible sub- 

 stances that are not metals, and of their combinations vA\h. 

 oxygen, with chlorine, and with each other. These substances 

 are hydrogen, azote, sulphur, phosphorus, carbon and diamond, 

 and boron. The following table exhibits the compounds of these 

 substances with oxygen 









Oxygen, 





Hydrogen 



1 





7-5 





8*5 water. 



Az;pte 



13 



+ 



7-5 





20*5 nitrous oxide. 





6-5 



+ 



7-5 





14 nitrous oxide. 





6-5 



+ 



15 





21*5 nitrous acid. 







4- 



22-5 





29 nitric acid. 



Sulphur 



15 



+ 



15 





30 sulphurous acid. 





15 





22-5 





37*5 sulphuric acid. 



Phosphorus 



10 





7-5 





17*5 phosphorous acid. 





10 





15 





25 phosphoric acid. 





20 



+ 



7-5 





27*5 oxide of phosphorus. 



Carbqn 



5-7 



+ 



15 





20*7 carbonic acid. 





5-7 



+ 



7-5 





13*2 carbonic oxide. 



Boron 









boracic acid. 



The following table exhibits the combinations which these 

 |>odies form with chlorine. 



Chlorine, 



1 + 33-5 = 34'5 muriatic acid. 

 Not determined, 



15 -f- 67 =82 sulphurane. 

 10 + 33*5 = 43*5 phosphoranCc 

 10 + 67 = 77 phosphorana. 

 Does not combine. 

 Unknown. 



Hydrogen 

 Azote 

 Sulphur 

 Phosphorus 



Carbon 

 Boron 



