244 GASEOUS BODIES. 



and specific gravities of all the gases and vapours 

 coming under this law. 



I. Gases whose specific gravity is equal to the 

 atomic weight multiplied by 1*1 111, 



'ATOMIC WEIGHT. SPECIFIC GRAVITY. 



Oxygen gas . . 1 1-1111 



Fluosilicic acid . . 3-25 3-611 i 



II. Gases and vapours whose specific gravity 

 = atomic weight multiplied by 0-5555. 



1. SIMPLE GASES AND VAPOURS. 



Hydrogen gas '. . 0-125 0-0694 



Carbon vapour . . 0-?5 0-4166 



5 Phosphorus vapour . 1-5 0-8333 



Azotic gas ... 175 0-9722 



Sulphur vapour . . 2 1-1111 



Tellurium vapour . . 4 2-2222 



Chlorine gas . . 4-5 2-5 



10 Arsenic vapour . . 4-75 2-6388 



Selenium vapour . . 5 2-7777 



Iodine vapour . . 15-5 8-611 i 



2. HYDROGEN, COMBINED WITH A SIMPLE BASE. 



Carburetted hydrogen . 1 0-5555 



Phosphuretted hydrogen 1-625 0-9027 



15 Subphosphuretted hydrogen 1-25 0-6944 



Bihydroguret of phosphorus 1-75 09722 



Sulphuretted hydrogen 2-125 1-1805 



Telluretted hydrogen . 4-125 2-2916 



Arsenietted hydrogen . 4 875 2-7083 



20 Selenietted hydrogen . 5-125 2-8522 



