potash

This I attribute to the potash being in a little more caustic condition than when recrystallised with iodine.

It dissolves in dilute potash, and on the addition of acetic acid is deposited in a pure state.

Eventually, however, both varieties become converted into clay, their magnesia and potash passing gradually into soluble forms.

All of them are particularly rich in potash, and contain but a small proportion of phosphoric acid.

In 1829 an English chemist discovered that matches on which had been placed chlorate of potash could be ignited by friction.