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Anhydride – Annunzio

Anhydride

or anhydrous acid, a chemical substance formed by the substitution of an acid radical for the whole of the hydrogen in one or two molecules of water. By the action of water they are converted into acids.

Anhydrite

an anhydrous calcium sulphate, classed by Dana under his celestite group. It is divided by Dana into Var. 1. Ordinary: (a) crystallized; (b) fibrous; (c) fine granular; (d) scaly granular, under which is ranked vulpinite. Var. 2. Pseudomorphous. It occurs in various parts of Europe and in North America.

Ani

the name given to the birds belonging to the genus crotophaga, and indeed to those ranked under the sub-family Crotophaginæ, a division of the Cuculidæ, or cuckoos; the typical anis, those of the genus crotophagæ, are found in South America, the West Indies and Florida. They are about the size of our blackbird.

ANILINE. See DYEING.

Animal Chemistry

the department of organic chemistry which investigates the composition of the fluids and the solids of animals, and the chemical action that takes place in animal bodies.

Animalcule

a general name given to many forms of animal life from their minute size.

Animal Magnetism

a or art, so called because it was believed science, that it taught the method of producing fects somewhat similar to those which a on persons of susceptible organization efmagnet exerts upon iron.

Anio

now ANIENE or TEVERONE, which it enters above Rome, renowned a river in Italy, a tributary of the Tiber, where stand the remains of the villas of for the valley through which it flows, Mæcenas and the Emperor Hadrian. Its famous waterfalls at Tivoli now furnish valuable electric energy which is transmitted to Rome.

Ankobar

the former capital of the kingdom of Shoa, in Abyssinia; is built 8,200 feet above sea-level. Pop. 2,000.

Annealing

a process to which many articles of metal and glass are subjected ANNISTON after making, in order to render them more tenacious, and which consists in heating them and allowing them to cool slowly.

Annual

in botany, a plant that springs from seed, grows up, produces seed, and then dies, all within a single year or season.

Annulosa

a sub-kingdom of the animal kingdom, corresponding to Cuvier's articulata. Annulosa, signifying ringed, is decidedly better, for the animals ranked under this sub-kingdom have their skeleton, which is external, composed of a series of rings. They are divided into chaetognatha, annelida, crustacea, arachnida, myriapoda, and insecta. The last four are further grouped together under the designation arthropoda.

Annunzio

GABRIELE D'. See D'ANNUNZIO, GABRIELE.