FLUOBORIC ACID. 183 



gen gas and an unknown supporter of combus- 

 tion, to which Davy has given the name of 

 fluorine. All the facts stated above may be Fluorine, 

 explained just as well by this hypothesis as by 

 the common one. An atom of fluorine will 

 weigh 2'&5, and fluoric acid will be a compound 

 of 



1 atom fluorine 2'250 



1 atom hydrogen 0-125 



2-375 



Fluosilicic acid will be a compound of 



1 atom fluorine 2*25 



1 atom silicon 1 



3-25 



And fluoboric acid will be composed of 



1 atom fluorine 2-25 



2 atoms boron 2 



4-25 



Fluor spar will be a compound of 



1 atom fluorine 2-25 



1 atom calcium 2-5 



4-75 



And in the same easy way may all the other 

 combinations given in this chapter be repre- 

 sented according to Davy's theory. At the 

 same time, this mode of representing these com- 

 binations does not give us any superior advan- 



M4. 



