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Altitude – Ammonium

Altitude

in mathematics the percal framework, by means of which a of a plane figure or solid above the base.

In astronomy it is the vertical height of any point of body above the horizon.

Alto

in music, the highest singing voice of a male adult, the lowest of boy or a woman, being in the latter almost the same as contralto. The alto, or counter-tenor, is not a natural voice, but a development of the falsetto.

Alunite

a chemical compound of aluminum and potassium sulphate. It is used as a source of alum. It is found chiefly in Europe and also in several parts of the United States, especially in Colorado.

Alwar

a city of India, about 100 miles from Delhi. It is the capital of the state of Alwar. The town has several important public buildings, including the Royal Palace and several churches. Pop. about 45,000. an

Alypin

a drug used often as a substitute for cocaine. It occurs as a white crystalline powder having a bitter taste and is usually soluble in water and alcohol.

Amaurosis

a disease of the eye, arising from impaired sensibility of the retina. Amaurosis arises from inflammation or turgescence of the retina, from derangement of the digestive organs, from exercise of the eye on minute objects, and from injury or disease of the fifth nerve or its branches, or from injury of the eye itself.

Amber

as a mineral, called also sucuntil 1893.

Ambrosia

in Greek mythology, the food of the gods, as nectar was their drink.

Ames

MARY CLEMMER, an American author, born in Utica, N. Y., in 1839. Among her works are the novels "Victoria" (1864); "Eirene" (1870), and "His Two Wives" (1874); a volume of "Poems" (1882); and biographies of Alice and Phoebe Cary. She died in Washington, D. C., Aug. 18, 1884.

Amherst College

an educational COLLEGE (q. v.), the State Agricultural College, and the State Experiment Stain 1821 and incorporated in 1825. The members of the faculty in 1919 numbered 52, and the students 503. The productive funds amounted to $3,800,000, and the income to $300,000. President, Alexander Meiklejohn, Ph . D., LL. D.

Ammonia

a substance consisting of NH3. Molecular weight, 17. Sp. gr. 8.5, compared with H; compared with air (1), its sp. gr. is 0.59. It is a colorless, pungent gas, with a strong alkaline re-

Ammonium

the name given by Berspecies have been described, ranging from the trias to the chalk. (NH4)'.