1 80 FLUORIC ACID AND ITS COMPOUNDS. 



act, is 2'36li a number which comes within 

 th part of the actual result of experiment 

 difference considerably within the unavoid- 

 able errors of experiment. 

 Fiuoborate g. Dr. Davy found that fluoboric acid gas, 



of ammo- J 



nia, and ammoniacal gas, combined with each other 

 in the three following proportions : 



(1.) 1 volume fluoboric gas 1 , 



}. forming a solid salt 



1 volume ammoniacal gas J 



(2.) 1 volume fluoboric eras 1 



V forming a liquid. 



2 volumes ammoniacal gas J 



(3.) 1 volume fluoboric gas 1 



. . V forming a liquid. 



3 volumes ammoniacal gas J 



Upon repeating these experiments I obtained 

 the very same results. 



From what was said in the seventh chapter of 

 this treatise, it will be evident to the reader, 

 that ammoniacal gas is twice as bulky with re- 

 lation to its atomic weight as any of the other 

 gases, with the exception of the four con- 

 tained in the same table with it. Consequently, 

 if we consider a volume of fluoboric acid gas to 

 represent an atom, it is clear that an atom of am- 

 monia must be represented by two volumes of 

 that gas. It is, therefore, the second of the 

 compounds of the two gases, consisting of 1 vo- 

 lume fluoboric gas, and 2 volumes ammoniacal 



