manganesum

It has been likewise conceived that there is a green oxide of manganesum; the olive oxide becomes green by the action of potassa; but in this case a combination takes place between the alkali and thie oxide.

Elements of Chemical Philosophy: Part 1, Vol.1 Humphry Davy, Sir Humphry Davy 1812

It is the only known oxide of manganesum which dissolves in the acids without effervescence.

Elements of Chemical Philosophy: Part 1, Vol.1 Humphry Davy, Sir Humphry Davy 1812

The changes of colour of glass containing ox - ide of manganesum, according to its different states of oxidation, are easily exemplified by adding a little dark oxide to powdered glass mixed with borax, and fusing them by the blow pipe: as long as the globule is preserved within the blue flame, where there is com - busdble matter, it remains colourless; but when it is exposed to air at the extreme point of the flame it becomes purple.

Elements of Chemical Philosophy: Part 1, Vol.1 Humphry Davy, Sir Humphry Davy 1812

"White hydrated oxide of manganesum appears from my experiments to contain about 24 per cent, of water.

Elements of Chemical Philosophy: Part 1, Vol.1 Humphry Davy, Sir Humphry Davy 1812