zvhich becomes a violet coloured Gas by Heat, 83 
riates of potassa, scintillate when thrown upon burning coals, 
and form a deflagrating mixture when mixed with charcoal. 
When fused, they give ofl' abundance of oxygen gas, and 
become the same substance as that formed by the action of 
potassium on the new substance. 
If the liquor which has ceased to afford the crystals be eva- 
porated to dryness, it yields a considerable quantity of a sub- 
stance which is not capable of detonating with combustible 
bodies, and which is the same as that afforded by the combi- 
nation of the substance with potassium. 
It is evident then that the oxygen contained in the potassa 
is newly combined by the action of the new substance, and 
two compounds formed, one consisting of potassium and the 
new substance, the other of potassium, the new substance, and 
the oxygen contained in the potassa. 
By passing the vapour of the substance over dry red hot 
potassa formed .from potassium, oxygen is expelled, and it 
appears that oxygen cannot remain in the triple compound at 
a heat above the red heat. 
By dissolving the substance in solutions of soda and baryta 
similar results are obtained, and in each case two compounds 
are formed. The oxygen is condensed in one, and the other 
consists simply of the new substance and a metal. 
To separate entirely the deflagrating salt from the soluble 
salt is not easy, there always remains in the mother liquor 
a little of the deflagrating compound ; but by separating the 
first crystals from solution of potassa not too strong, tiie de- 
flagrating compound of oxygen, potassium, and the substance 
is obtained, apparently pure. 
As the new substance combines with potassium and the 
M 2 
