A metal discovered by Klaproth in 1798, in an ore of gold from Transylvania. It has a silver-white colour, and possesses much brilliancy. Its texture is laminated like antimony, and has a specific gravity of 6.115. It is very brittle, may be easily reduced to powder, and melts at a temperature a little higher than lead does. If the heat be increased a little above the fusing point, it boils and evaporates, and attaches itself in brilliant drops on the upper part of the retort in which the experiment is made; it is, therefore, next to mercury, and arsenic, the most volatile of the metals. It combines with oxygen only' in one proportion, forming therewith a compound possessing acid properties.