226 Experiments on the Oxygenated 
the salt in hot water, and, when cold, seperating 
the salt and suffering the water to evaporate spon- 
taneously. | 
I frequently observed, that unless the alkali be- 
gan to part with a considerable portion of gas, 
without the admission of any from the apparatus, that 
little or none of the oxygenated muriat was procur- 
ed; and that as this gas (which I have before observ- 
ed to be chiefly the carbonic acid) escaped, the cry- 
stallization took place, and increased or diminished’ 
according to the evolution of that gas. This I 
found uniformly the case whether mild or caustic 
alkali was employed. A given quantity of the 
strong solution of potash appeared to produce more 
of this salt than the same quantity of a solution of 
pearl-ash of the same specific gravity. 
_ The remaining lixivium, on evaporation, did not 
yield this salt, though a muriat of potash was form- 
ed that appeared to be considerably oxygenated: 
since, with the addition of the sulphuric or muriatic 
acid, it became a very powerful destroyer of vege- 
table colours; it would not detonate with sulphur 
or inflame combustible substances with acids; it 
was very soluble in water, much more so than the 
muriat first formed from the same alkali. 
I may here remark, that I think the French 
chemists were right in calling the first salt the hy; 
peroxygenated muriat, as the salt last mentioned is 
certainly oxygenated in some degree ; however, in 
