Muriat of Potash. 229 
muriatic acid; from which I inferred that the whole 
of the oxygen had not been expelled by the heat; 
whence the oxygenated muriat of potash may, I 
think, be stated to contain about half its weight of 
oxygen, ina concrete state. 
EXPERIMENT VI. 
Strong nitrous acid disengaged the oxygenated 
muriatic acid from this salt. During the solution of 
two or three grains of the oxygenated muriat in this 
acid, a grain or two of phosphorus was dropped in- 
to the glass containing the mixture, when a num- 
ber of vivid flashes appeared in the liquor, darting 
forth at intervals, for a considerable time, This is 
one of the most striking experiments I ever saw; 
‘but a little caution is necessary in performing it, 
7 
the phosphorus being sometimes thrown out of the 
mixture.* 
EXPERIMENT VII. 
The muriatic acid dissolved this salt, a great deal 
of the oxygenated acid being given out. A few 
grains of the salt added to an ounce of the acid ren- 
dered it a very powerful destroyer of vegetable | 
colours. This mixture may probably be used with 
advantage in taking stains of ink, dc. out of linen 
or cotton. 
Phosphorus added to this acid along with the : 
* This curious experiment was first noticed by J. Col- 
lier, and was communicated by him to the Society, some 
time ago, 
