CELLULARES. In botany, a name given to cryptogams, or flowerless plants, upon the supposition that they consist entirely of cells.
CEL′LULOSE. See Lignin.
CEMENT′. Syn. Cement′tum, L. Any substance which, when applied to the surfaces of other bodies, causes them to adhere together when placed in contact. Those referred to below are amongst the most useful preparations of this class. The term cement is also applied by builders and architects to several species of mortars and like compositions employed either to unite stones and bricks into masses, or as a protective covering against the weather or water, or to make statues, cornices, and similar ornamental articles.
In general the thinner the stratum of interposed cement, the stronger is the junction of the surfaces operated on. This caution is necessary, as in their anxiety to unite broken articles persons generally defeat themselves by spreading the cement too thickly on the edges of the fracture; whereas the least possible quantity should be used, so as to bring the edges as close as possible together.
Cement, Al′abaster. 1. Prom plaster of Paris (in fine powder), made into a cream with water, and at once applied.
2. Yellow resin, 2 parts; melt and stir in plaster of Paris, 1 part.
3. Yellow resin, beeswax, and plaster of Paris, equal parts.
4. Resin, 8 parts; wax, 1 part; melt and stir in plaster of Paris, 4 parts, or q. s.
5. Sulphur or shell-lac, melted with sufficient plaster of Paris or colouring matter to give the desired shade. Used to join or mend pieces in alabaster, white marble, Derbyshire spar, porphyry, and other like substances; and to fill up cracks, supply chips out of corners, &c. The last four are applied hot, the surfaces to be united having been previously warmed. See Cement, Waterglass.
Cement, Architect′ural. 1. From paper (reduced to a smooth paste by boiling it in water), sifted whiting, and good size, equal parts, boiled to a proper consistence.