A solid of the form described by the revolution of a right-angled triangle about one of the sides adjacent to the right angle; -- called also a right cone. More generally, any solid having a vertical point and bounded by a surface which is described by a straight line always passing through that vertical point; a solid having a circle for its base and tapering to a point or vertex.

To render cone-shaped; to bevfl like whe circwlar segoent of a cone; as, to cone the tires of car wheels.

A package of thread, usually a plastic tube, capable of holding thousands of yards of thread for industrial sewing. Thread is wound onto cones in an x-shaped pattern for easy release.

A solid with a circle for its base and a curved surface tapering to a point.

Anything shaped more or less like a mathematical cone; as, a volcanic cone, a collection of scoriæ around the crater of a volcano, usually heaped up in a conical form.

The fruit or strobile of the Coniferæ, as of the pine, fir, cedar, and cypress. It is composed of woody scales, each one of which has one or two seeds at its base.

A shell of the genus Conus, having a conical form.

The reproductive structure of conifers. As used in this book it refers to the female cone which bears the conifer seed.

one of the two photoreceptors in the vertebrate eye that detects color during the day.

Light-sensitive retinal photoreceptor cell that provides sharp visual acuity and color discrimination.

The light-sensing structure on the retina of the eye capable of detecting colour.

one of the types of visual receptors of the retina that are especially important in visual acuity and color vision.

Originally, cones forms were made of the glaze the potter was using. These cones were set insde the kiln in front of a peep hole. As the temperature of the kiln rose, the cone would melt in front of the peep hole telling, the potter it had reached the right temperature. Unfortunitly, it was unreliable and inconsistant. Then potters varied the glzae mixture to be just above or just below the right temperature. Setting three cones in a row by a peep hole, the potter could predict just when to stop stoking the fire. Modern potters buy accurately formulated cones compounded to melt at specific tempertures. Firing consistantly is an art that relies on science and experience.

thin, tapered length of molded ceramic materials formulated to melt at a prescribed temperature providing an indication of temperature inside the kiln. Also the temperature of firing for a specific process or clay body, ranging from cone 022 (low) to cone 12 (high).

Small conical object made of compressed graduated glaze materials with a known melting point, used to indicate temperature reached in a kiln at a given point.

Pyrometric - A pyramid composed of clay and glaze, made to melt and bend at specific temperatures. It is used in a kiln to determine the end of a firing or in some electric kilns it shuts off a kiln setter.

Typically 7" long, 3" dia., with handle, Paoli $30. Wood or graphite, for opening glass shapes and providing a variable sized round tool for working the glass.

a series of infinitesimally thin disks of varying radius

Generic term used to describe the process of using a special tool to "countersink" or "radius" the inside of a hosel in order to help provide a measure of protection, particularly for a graphite shaft.