(From hollow, and the mouth). A defect in speaking, when a person's speech is obscured by sounding, as if his voice proceeded from a cavern.
(From caedo,to beat together). Cement, also caementum. It is a tenacious matter, by which two bodies are made to adhere. What is used by the chemists is commonly called lute.
Cements are also those powders and pastes with which any body is surrounded in pots or crucibles, producing, by the help of fire, changes in the substance round which they are spread. The common cement, directed by Schroeder, is the following: take half a pound of finely powdered brick dust, four ounces of common salt, and of nitre and verdigrise, each an ounce.
There are many compositions for cementing, which may be seen in chemical authors; one of the chief is what is called the royal cement, because used in purifying gold and silver. It is made with four parts of fine brick dust, one part of green vitriol, calcined to redness, and one part of common salt: when mixed, they must be worked into a firm paste with water. See Dict. of Chem. 4to. Neumann's Works.
(From common; as a meal necessary to all). Supper. Suppers that are heavy should be avoided, because digestion produces a slight fever, which increases the natural evening paroxysm; and, though the robust feel no inconvenience from neglecting this rule, the invalid will suffer greatly by the error. Suppers should, therefore, be eaten long before bed time, that they may be nearly digested before the hour of sleep; and then a draught of pure water will usefully dilute what remains in the stomach. Indeed suppers, in many constitutions, are very pernicious; inducing disagreeable dreams, disturbed rest, the incubus or night-mare, particularly in those who have weak digestions.
(From common). The physicians of the Methodic sect asserted, that all diseases arose from relaxation, stricture, or a mixture of both. The last were called caenotes, because diseases have these in common.
(Quasi caelulcus, from caelum, the sky, of a sky blue colour.) Mountain-blue. It is a blue ore of copper.
Coeruleum fossile. See Armenus lapis.
See Vitriolum coeruleum.
Co-hobation. It is the returning a liquor, distilled from any substance, back again upon the same substance, and redistilling it with or without an addition of fresh ingredients. The alembic, called a pelican, was invented for the more easily effecting this operation; modern chemists neglect it. Paracelsus uses the word cohob when a disease does not easily yield to the remedies applied. Medicines, therefore, are to be given secundum cohob; that is, repeated at intervals.