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rms of the same substance; or the substance having such forms; -- as, carbonate of lime occurs in the allomorphs calcite and aragonite.

lotropism. -- Al`lo*trop"ic*al*ly, adv. Allotropic state, the several conditions which occur in a case of allotropism.

mixture of metals; for example, brass, which is an alloy of copper and zinc. But when mercury is one of the metals, the compound is called an amalgam.

A practitioner who tries to prevent or cure baldness.

ion sometimes observed after the summits have passed into shadow, supposed to be due to a curving downward (refraction) of the light rays from the west resulting from the cooling of the air.

A curved wooden horn about three feet long, with a cupped mouthpiece and a bell, used by the Swiss to sound the ranz des vaches and other melodies. Its notes are open harmonics of the tube.

the act of following and being followed by turns; alternate succession, performance, or occurrence; as, the alternation of day and night, cold and heat, summer and winter, hope and fear.

An electric generator or dynamo for producing alternating currents.

An alloy of mercury with another metal or metals; as, an amalgam of tin, bismuth, etc.

compound or mix, as quicksilver, with another metal; to unite, combine, or alloy with mercury.

The act or operation of compounding mercury with another metal; -- applied particularly to the process of separating gold and silver from their ores by mixing them with mercury. Ure.

ating precious metals from earthy particles by bringing them in contact with a body of mercury with which they form an amalgam.

A beautiful mottled and curled wood, used in cabinetwork. It is obtained from the Pterocarpus Indicus of Amboyna, Borneo, etc.

A fossil resin occurring in large masses in New Zealand.

Divinely excellent or beautiful. "Shakes his ambrosial curls." Pope.

a declaration, it is equivalent to truly, verily. It is used as a noun, to demote: (a) concurrence in belief, or in a statement; assent; (b) the final word or act; (c) Christ as being one who is true and faithful. And let all the people say, Amen. Ps. cvi. 48. Amen, amen, I say to thee, except a man be born again, he c…

-- opposed to mitosis. It is not the usual mode of division, and is believed by many to occur chiefly in highly specialized cells which are incapable of long-continued multiplication, in transitory structures, and in those in early stages of degeneration.

ema ammoniacum. It is brought chiefly from Persia in the form of yellowish tears, which occur singly, or are aggregated into masses. It has a peculiar smell, and a nauseous, sweet taste, followed by a bitter one. It is inflammable, partially soluble in water and in spirit of wine, and is used in medicine as an expector…

The strength of a current of electricity carried by a conductor or generated by a machine, measured in ampères.

A unit, employed in calculating fall of pressure in distributing mains, equivalent to a current of one ampère flowing through one foot of conductor.