in Geometry, a solid figure, having a circle for its base, and its top terminated in a point or vertex. See Conic Sections.

Melting Cone, in Chemistry, is a hollow cone formed of copper or brass, with a handle, and with a flat bottom adjoining to the apex of the cone, upon which it is intended to rest. Its use is to receive a mass of one or more metals melted together, and cast into it. This mass, when cold, may be easily thaken out of the vessel, from its figure. Also, if a melted mass consisting of two or more metals, or other substances not combined together, be poured into this vessel, the conical figure facilitates the separation of these substances according to their respective densities. The cone ought to be well heated before the melted mass is thrown into it; that it may not contain any moisture, which would occasion a dangerous explosion. It ought also to be greased internally with tallow, to prevent the adhesion of the fluid matter.

Cone of Rays, in Optics, includes all the several rays which fall from any radiant point upon the surface of a glass.

Cone. See Conus, Botany Index.

Cone-Shell. See Conus, Conchology Index.