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- Decomposition of the
common earths by
Potassium - difficulty
of obtaining globules -
Instance
Manganese . -
Potassium destroyed.-
Silex - separated from fluoric
acid by Boracic -
probably forms the link
[acidafluous] from inflammable
matter & Alkaline.
- So that as in the
world of animated Nature
there is a gradation of
similar qualities; - One form

✕

Manganese

Symbol/formula: Mn

A hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese was first isolated in the 1770s.

✕

Potassium

Symbol/formula: K

A silvery white metal that is soft enough to easily cut with a knife. Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure.

✕

Silex

Symbol/formula: SiO2

Silica, an oxide of silicon.

✕

Fluoric acid

Symbol/formula: HF

Hydrofluoric acid. A solution of hydrogen fluoride in water.

✕

Boron

Symbol/formula: B

A non-metallic solid substance, believed to be a metal before it was isolated by Davy.