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When the Tooth is greatly decayed, there is no other Cure besides that by extracting it, without which the Pain continues; the Breath becomes very offensive; the Gum is eat down; the other Teeth, and sometimes even the Jaw-bone, are infected with the Rottenness: besides, that it prevents the Use of the other Teeth, which are infected with a kind of tartarous Matter, and decay.

This solution, applied daily, preserves and beautifies the teeth, extirpates all tartarous adhesion, produces a pearl-like whiteness, arrests decay, and induces a healthy action in the gums.

From these it appears, that charcoal and hydrogen, by a first oxygenation, produce tartarous acid, oxalic acid by a second degree, and acetous or acetic acid by a third, or higher oxygenation; only, that charcoal seems to exist in a rather smaller proportion in the acetous and acetic acids.

As the combustible radical exists in excess, or as the acid from tartar is not fully saturated with oxygen, we call it tartarous acid, and the neutral salts formed by its combinations with salifiable bases tartarites.

The base of the tartarous acid is a carbono-hydrous or hydro-carbonous radical, less oxygenated than in the oxalic acid; and it would appear, from the experiments of Mr Hassenfratz, that azote enters into the composition of the tartarous radical, even in considerable quantity.