Vauquelin

The perfumer destined this engraving for the savant Vauquelin, to whom he was under obligations.

The Pliade was essentially pagan, Vauquelin essentially Christian.

Vauquelin found nine different substances in black hair; in red hair, a red oil instead of a greenish-black one.

The specific gravity of this metal, when laminated, is stated by Dr. Wollaston at 11·8, and by Vauquelin at 12·1.

This substance was the lime salt of an acid to which Vauquelin in 1806 gave the name of quinic acid (acide quinique).