PDF - Cunningham Memorial Library

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Crypt, s. from "purrT"', leruplo, I hide. A slIbterraneous
cellm', or vault, especially under" church, for the
interment of particular families or persons.
C"ypto-graphy, s. See GRAPHE, p. 10.
Crystal, s. from "purrTCJ.1\.1\.os, lcrust"IWs, icc. The term
crystal seems to have been first applied to rock crystal,
for, from its hyaline appearance, and its being procured
among cold mountainous regions, in which icc
is to be found in all seasons of the year, it bears a
much nearer resemblance- to icc than any other crystallized
substance; and was at first supposed to be
nothing more than water indurated by continued
frost to a greater degree than COlnmOll icc, and there..
fore morc permanent. The tertn was, however, afterwards
used in a more extended sense, and applied to
all substances, uniting, after a separation of their
lJarticlcs, into a regular figure. Thus the term is
used to express salts congealed in the manner of
crystal.
Cube, s. from "ugos, lcllb~s, a die. A regular solid
body, consisting of six square aUlI equal faces 01'
sides, with the angles all right, and therefore equal.
- CUBES AND SQUARES OF NUMBERS. The square
root of a nnmber is that which, multiplied by itself,
produces the square, thus,
1 1
1 1
1 1
:; is the square root of 9, and 9 is the square of 3.
The cubes oreubitnumbers arc fonned bymnltiplying
any numbers twice hy themselves, thus 3 is the cube
Tool of 27 (3 times 3 arc nine, and 3 times 9 arc 27),
and 27 is the cube of 3.
Cyclo-predia, s. from KUKXOS, kukl'6s, a circle, and '1TaIBerlT,
lJaideia, instruction. A course of the sciences. The
term has of late been applied to books which, without
pretending to exhibit the entire circle of the sciences.
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