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Red sulphide of mercury, occurring in brilliant red crystals, and also in red or brown amorphous masses. It is used in medicine.

Mercury telluride, an iron-black metallic mineral, found in Colorado.

hitecture; an upright body or mass; a shaft or obelisk; as, a column of air, of water, of mercury, etc. ; the Column Vendôme; the spinal column.

rcuric bichloride. It is to be carefully distinguished from calomel, the mild chloride of mercury.

such an instrument containing alcohol or some other liquid of a lower freezing point than mercury.

ne, on which, after exposure in the camera, the latent image is developed by the vapor of mercury.

port upon ignition. -- Detonating powder, any powder or solid substance, as fulminate of mercury, which when struck, explodes with violence and a loud report. -- Detonating primer, a primer exploded by a fuse; -- used to explode gun cotton in blasting operations. -- Detonating tube, a strong tube of glass, usually g…

n any discontinuation of parts, made either by bubbles or by shaking the glass, the whole mercury falls. Sir I. Newton.

ure of an eclipse, is called an occultation. The eclipse of a small portion of the sun by Mercury or Venus is called a transit of the planet.

The angular distance of a planet from the sun; as, the elongation of Venus or Mercury.

tial (Old Chem.), black oxide of iron. -- Ethiops mineral (Old Chem.), black sulphide of mercury, obtained by triturating mercury with sulphur. -- Ethiops per se (Old Chem.), mercury in finely divided state, having the appearance of a dark powder, obtained by shaking it up or by exposure to the air.…

scend by the force of gravity; to drop; to sink; as, the apple falls; the tide falls; the mercury falls in the barometer. I beheld Satan as lightning fall from heaven. Luke x. 18.

or wings; as, a feathered animal; a feathered arrow. Rise from the ground like feathered Mercury. Shak. Nonsense feathered with soft and delicate phrases and pointed with pathetic accent. Dr. J. Scott.

r finding the depth of the sea. -- Siphon gauge, a glass siphon tube, partly filled with mercury, -- used to indicate pressure, as of steam, or the degree of rarefaction produced in the receiver of an air pump or other vacuum; a manometer. -- Sliding gauge. (Mach.) (a) A templet or pattern for gauging the commonly ac…

etc. -- Gold amalgam, a mineral, found in Columbia and California, composed of gold and mercury. -- Gold beater, one whose occupation is to beat gold into gold leaf. -- Gold beater's skin, the prepared outside membrane of the large intestine of the ox, used for separating the leaves of metal during the process of g…

d in the arteries, or veins, is measured by the height to which it will raise a column of mercury; -- called also a hæmomanometer.

See Mercury.

nt horizon. See under Apparent. -- Artificial horizon, a level mirror, as the surface of mercury in a shallow vessel, or a plane reflector adjusted to the true level artificially; -- used chiefly with the sextant for observing the double altitude of a celestial body. -- Celestial horizon. (Astron.) See def. 2, above.…

ead (Chem.), chloride of lead. -- Horn maker, a maker of cuckolds. [Obs.] Shak. -- Horn mercury. (Min.) Same as Horn quicksilver (below). -- Horn poppy (Bot.), a plant allied to the poppy (Glaucium luteum), found on the sandy shores of Great Britain and Virginia; -- called also horned poppy. Gray. -- Horn pox (Med.…

vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running through a small aperture unto the lower.