Chain hoist to Charge.

Chain hoist. (Engin.) A block and tackle in which chain is used in­stead of rope.
Chain man. One who holds the zero end of the tape or chain.
Chain pipe vise. (Steam Fit.) A port­able vise utilizing a heavy chain to fasten the pipe in the jaw.
Chain pulley. (Mech.) A sheave wheel or pulley with depressions to engage the links of a chain.
Chain reaction. A self sustaining re­action in which the fission of nu­clei produces particles that cause the fission of other nuclei.

Chain riveting. (Engin.) Double, or multiple row riveting in which riv­ets are placed opposite each other as distinguished from staggered or zig-zag riveting.
Chain tongs. (Plumb.) Used for hold­ing pipe from turning or to turn pipe. It is a heavy bar with sharp teeth at one end, which are held against the pipe by a chain wrapped around the pipe and attached to the bar.
Chain transmission. (Mach.) A means of transmitting power, use­ful when the distance between driver and driven shafts is too great or gearing and not sufficient for belting.
Chair glide. (Uphol.) Also known as "dome of silence," is a rounded cupshaped piece of metal used on the bottom of the legs of furniture. It permits easy and noiseless moving of furniture over rugs and floors.
Chair rail. "(Bldg.) Usually a wooden band or molded strip attached to a wall at the level of tops of chair backs to prevent marring the plaster.
Chaise longue. (Furn.) A french style of sofa, made like a chair with a seat long enough to recline upon. Dur­ing the middle of the eighteenth cen­tury, when first in favour, it was made in three parts, a pair of arm­chairs and a stool.
Chalcedony. (Mineral.) A translucent quartz, usually pale blue or gray.
Chalcocite. Cu2S. Copper ore; a sul­phide of copper.
Chalcopyrite. (Metal.) (CuFeS2"> A yellow sulphide of copper and iron. chalk (Mineral.) A soft limestone of earthy texture, chiefly composed of the minute shells of For-aminifera, which are very mall marine organisms.
Chalking. (Plast.) Dry, chalk-like ap­pearance or deposit on the surface of a plastic.
Chalk line. Also called snap line. Used freqently for making a straight line on a floor for placement of shafting, machinery, etc. a piece of string coated with chalk is drawn taut be­tween two points along the floor. When raised at a mid-point and al­lowed to snap back. a straight chalk line is made on the floor.

Chalk overlay. (Print.) A mechani­cal process for bringing printing plates and type to a smooth, even surface for reproduction. (SEE MAKE-READY).
Chalk-plate. (Print.) A kind of plate frequently cast by stereotypers for use in newspaper work.
Chamfer. (Patmkg., and Fdry.) A pattern or casting which is hol­lowed or chambered out. (Shopwk.) A long recess. (See Recess).
Chandelle. (Aero.) An abrupt climb­ing turn to approximately a stall in which the momentum of the airplane is used to obtain a higher rate of climb than would be possi­ble in unaccelerated flight. The purpose of this maneuver is to gain altitude at the same time that di­rection of flight is changed.
Change gears. (Auto. Mech.) The transmission device on an automo­bile. (Mach.) The arrangement of lathe gears for cutting screw threads; the train of gears may be combined to give different rates of advance so that the threads of a variety of pitches may be cut.
Change-over cues. (Tel.) A set of marks on frames of motion-picture film which aid projectionist in manual change from one projector to another for continuous action.
Channel. (Furn.) A concave line cut into a surface; used as a decorative feature in moldings and parts of furniture. (Tel) The band or chan­nel in the radio spectrum assigned to a television station or to other forms of communication.
Channel iron. Rolled bars consist­ing of a web and two flanges; in section it is like a hollow square with one side omitted.
Chapel. (Print.) An organized group of workmen in a printing plant.
Chaplet. (Fdry.) A metal support used for holding a core in position. .
Chaptrel. (Arch.) In Gothic architec­ture, the capital of a pier or column which receives an arch.
Characteristic. (Math.) The index or integral part of a logarithm.
Characteristic curVe of dynamo.(Elec.) In a generator the relation of the output in volts and amperes to the speed and load. In a motor the re-lation of its speed of the load placed on it. These values are predictable if the curve has been plotted from the results of a test.
Characteristic spectrum. Ordered ar­rangement in terms of frequency (or wave length) of radiation (optical or X-ray) related to the atomic structure of the material giving rise to them.
Charcoal. Wood which has been charred and carbonized.
Charcoal iron. (Sheet-Met. Wk.) A very superior quality of iron which is smelted with wood charcoal as fuel. Its quality lies in its fteedom from sulphur.
Charge. (Elec.) The quantity of electricity residing on an electrostatically charged body.
Charged cell. (Elec.) A storage cell which has had direct current passed, through it until the positive plate has