AZOTIC GAS. 



But a volume of azotic gas being equivalent to 

 an atom, and half a volume of oxygen gas equi- 

 valent to an atom, nitrous acid is obviously com- 

 posed of 



1 atom azote Its atomic 



4 atoms oxygen weight. 



Hence its atomic weight is 5*75. 



Such are the atomic weights and constitutions Compounds 

 of all the known compounds of azote and oxy- with 

 gen. Azote appears likewise capable of uniting 

 with chlorine and iodine ; the compounds formed 

 possess violently detonating properties, and have 

 not hitherto been applied to any useful purpose. 

 I have not myself made any experiments to de- 

 termine the composition of these substances. 

 Davy made some experiments on the chloride of 

 azote, from which he deduced its constituents 

 to be 



4 atoms chlorine == 18 

 1 atom azote = 1*75 



19-75 



Gay-Lussac, from theoretical considerations, con- 

 siders the iodide of azote to be a compound of 



3 atoms iodine = 36-5 , 



1 atom azote =' 1'75 



37-25 



It would be very difficult to analyze it, for it de- 



