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iformly in the circumference of a circle, and PA is drawn perpendicularly upon a fixed diameter of the circle. This is simple harmonic motion. The combinations, in any way, of two more simple harmonic motions, make other kinds of harmonic motion. The motion of the pendulum bob of a clock is approximately simple harmoni…

A measure of area, or superficies, containing a hundred ares, or 10,000 square meters, and equivalent to 2.471 acres.

A measure of liquids, containing a hundred liters; equal to a tenth of a cubic meter, nearly 26

A measure of solidity, containing one hundred cubic meters, and equivalent to 3531.66 English or 3531.05 United States cubic feet.

Of or pertaining to the heliometer, or to heliometry.

The apart or practice of measuring the diameters of heavenly bodies, their relative distances, etc. See Heliometer.

of ten syllables; in French the iambic of twelve syllables; and in classic poetry the hexameter.

One who writes in hexameters. "The Christian hexametrists." Milman.

Wholly solid; -- said of a barometer constructed of solid materials to show the variations of atmospheric pressure without the use of liquids, as the aneroid.

Homer, the most famous of Greek poets; resembling the poetry of Homer. Homeric verse, hexameter verse; -- so called because used by Homer in his epics.

A short, light, largebore cannon, usually having a chamber of smaller diameter than the rest of the bore, and intended to throw large projectiles with comparatively small charges.

Of or pertaining to an hydrometer, or to the determination of the specific gravity of fluids.

means of water forced into the cylinder in which it moves, by a forcing pump of small diameter, to which the power is applied, the principle involved being the same as in the hydrostatic bellows. Also called hydraulic press, and Bramah press. In the illustration, a is a pump with a small plunger b, which forces the wa…

A device for raising water by the direct action of steam; a pulsometer.

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

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

r pert. to hysteresis. -- Hysteretic constant, the hysteretic loss in ergs per cubic centimeter per cycle.

Pertaining to, or composed of, iambics; as, an iambic verse; iambic meter. See Lambus.

d out, by means of an implement or implements. The chief mechanical requisites of the barometer are implemented in such an instrument as the following. Nichol.

Decantation, or tipping for pouring. Inclination compass, an inclinometer. -- Inclination of an orbit (Astron.), the angle which the orbit makes the ecliptic. -- Inclination of the needle. See Dip of the needle, under Dip.