CARTESIAN a.
an coördinates (Geom), distance of a point from lines or planes; -- used in a system of representing geometric quantities, invented by Descartes. -- Cartesian devil, a small hollow glass figure, used in connection with a jar of water having an elastic top, to illustrate the effect of the compression or expansion of ai…
CHARCOAL n.
ears this material has been used almost exclusively for preliminary outline, etc., but at present many finished drawings are made with it. -- Charcoal point, a carbon pencil prepared for use un an electric light apparatus. -- Mineral charcoal, a term applied to silky fibrous layers of charcoal, interlaminated in beds…
CHART n.
nstructed on the principle of Mercator's projection. See Projection. -- Plane chart, a representation of some part of the superficies of the globe, in which its spherical form is disregarded, the meridians being drawn parallel to each other, and the parallels of latitude at equal distances. -- Selenographic chart, a…
CHIMNEY n.
fireplace; a fireboard. -- Chimney cap, a device to improve the draught of a chimney, by presenting an exit aperture always to leeward. -- Chimney corner, the space between the sides of the fireplace and the fire; hence, the fireside. -- Chimney hook, a hook for holding pats and kettles over a fire, -- Chimney money…