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A treatise on, or the science of, the preservation of health. [R.]

An alkaloid associated with cocaine in coca leaves (Erythroxylon coca), and extracted as a thick, yellow oil, having a pungent taste and odor.

A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc.

An instrument for recording automatically the variations of the humidity of the atmosphere.

The science which treats of the fluids of the body.

An instrument for measuring the degree of moisture of the atmosphere. Daniell's hygrometer, a form of hygrometer consisting of a bent glass tube terminating in two bulbs, the one covered with muslin, the other of black glass, and containing ether and a thermometer. Ether being poured on the muslin, the black ball, cool…

Of or pertaining to hygrometry; made with, or according to, the hygrometer; as, hygrometric observations.

That branch of physics which relates to the determination of the humidity of bodies, particularly of the atmosphere, with the theory and use of the instruments constructed for this purpose.

Having such a structure as to be diaphanous when moist, and opaque when dry.

Serving to moisten the eye; -- sometimes applied to the lachrymal ducts.

The fluid portion of the cell protoplasm, in opposition to stereoplasm, the solid or insoluble portion. The latter is supposed to be partly nutritive and partly composed of idioplasm.

An instrument which shows whether there is more or less moisture in the atmosphere, without indicating its amount.

Of or pertaining to, or indicated by, the hygroscope; not readily manifest to the senses, but capable of detection by the hygroscope; as, glass is often covered with a film of hygroscopic moisture.

The property possessed by vegetable tissues of absorbing or discharging moisture according to circumstances.

The science or art of comparing or measuring degrees of moisture. Evelyn.

See Haik, and Huke.

at the XVIth is merely a double of the XVth dynasty, and that the total period of the six Hyksos kings was little more than 100 years. It is supposed that they were Asiatic Semites.

A large Wealden dinosaur from the Tilgate Forest, England. It was about twenty feet long, protected by bony plates in the skin, and armed with spines.

Presiding over matter. [Obs.] Hallywell.

Same as Hylæosaur.