132 Mr. Chenevix's Observations and Experiments 
of potash: therefore, 16 were hyperoxygenized muriate of 
potash.* But, according to the proportions established above 
in hyperoxygenized muriate of potash, 16 of this salt contain 6 
of oxygen, with 3,20 of acid, the remainder being alkali and 
water; and, by preliminary experiments, I found that 84 of 
piuriate of potash contained 27,88 of muriatic acid. Therefore, 
27,884-3,20=31,08 of muriatic acid, with 6 of oxygen, or* 
to reduce it to the quintal, 
Muriatic acid 84, 
Oxygen - - - - 16 
100, are the proportions 
which combine to form oxygenized muriatic acid. 
To corroborate this evidence, I distilled 100 grains of the 
entire salt mentioned above; and obtained nearly 16,5 cubic 
inches of oxygen gas ; which as accurately corresponds with the 
trial by nitrate of silver, as can be expected in experiments of 
this nature. 
Mr. Berthollet, in his Memoir upon oxygenized muriatic 
acid, gives, if I understand him rightly, the following state- 
ment of the proportions, and of the means by which he ob- 
tained his results. He exposed to the light of the sun, 50 
cubic inches of water, saturated with oxygenized muriatic 
acid; and collected in the pneumatic tub, 15 cubic inches of 
oxygen gas. I here neglect fractions ; because our results ap- 
pear, at first sight, to differ so widely as not to require great 
accuracy in giving their comparative statement. He then preci- 
* 1 must observe here, that hyperoxygenised muriate of potash does not, like simple 
muriate, decompose the salts of silver. This shall be further animadverted upon, and 
proved, in its proper place. 
