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A green micaceous mineral occurring in minute scales. It is essentially a silicate of aluminia and potash containing vanadium.

A hydrous arsenite of cobalt, occuring in small red crystals, allied to erythrite.

Any fossil foraminifer of the genus Rotalia, abundant in the chalk formation. See Illust. under Rhizopod.

A variety of tourmaline varying in color from a pale rose to a deep ruby, and containing lithium.

See Salite.

A compound of salicylal; -- named after the analogy of a salt.

A massive lamellar variety of pyroxene, of a dingy green color. [Written also sahlite.]

attached to a prince or other powerful person; hence, an obsequious dependent. "The satellites of power." I. Disraeli.

A grayish white mineral occuring in tetragonal crystals and in cleavable masses. It is esentially a silicate of aluminia and soda.

Calcium tungstate, a mineral of a white or pale yellowish color and of the tetragonal system of crystallization.

A white crystalline substance of a sweetish taste, resembling inosite and metameric with dextrose. It is extracted from the kidney of the dogfish (of the genus Scylium), the shark, and the skate.

A plant (Suæda maritima) of the Goosefoot family, growing in salt marches.

Meerschaum. See Meerschaum.

A fossil serpula shell.

A kind of meteorite. See under Meteorite.

The technical name of the form by which either party, in pleading, accepts the issue tendered by his opponent; -- called sometimes a joinder in issue.

A mineral of a white to blue or gray color, occuring commonly in dodecahedrons, also massive. It is a silicate of alumina and soda with some chlorine.

An arsenide of platinum occuring in grains and minute isometric crystals of tin-white color. It is found near Sudbury, Ontario Canada, and is the only known compound of platinum occuring in nature.

Same as Spherulite.

A minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone.