resque,
and the tide rises and falls about 25 ft. The city has important interests
in lumber, besides foundries, machine shops, granite works--there are
several granite (notably red granite) quarries in the vicinity--a tannery,
and manufactories of shoes and calcined plaster. Big Island, now in the
city of Calais, was visited in the winter of 1604-1605 by Pierre du Guast,
sieur de Monts. Calais was first settled in 1779, was incorporated as a
town in 1809, and was chartered as a city in 1851.

CALAIS and ZETES (the Boreadae), in Greek mythology, the winged twin sons
of Boreas and Oreithyia. On their arrival with the Argonauts at Salmydessus
in Thrace, they liberated their sister Cleopatra, who had been thrown into
prison with her two sons by her husband Phineus, the king of the country
(Sophocles, _Antigone_, 966; Diod. Sic. iv. 44). According to another
story, they delivered Phineus from the Harpies (_q.v._), in pursuit of whom
they perished (Apollodorus i. 9; iii. 15). Others say that they were slain
by Heracles near the island of Tenos, in consequence of a quarrel with
Tiphys, the pilot of the Argonauts, or because they refused to wait during
the search for Hylas, the favourite of Heracles (Hyginus, _Fab._, 14. 273;
schol. on Apollonius Rhodius i. 1304). They were changed by the gods into
winds, and the pillars over their tombs in Tenos were said to wave whenever
the wind blew from the north. Like the Harpies, Calais and Zetes are
obvious personifications of winds. Legend attributed the foundation of
Cales in Campania to Calais (Silius Italicus viii. 512).

CALAMINE, a mineral species consisting of zinc carbonate, ZnCO_3, and
forming an important ore of zinc. It is rhombohedral in crystallization and
isomorphous with calcite and chalybite. Distinct crystals are somewhat
rare; they have the form of the primitive rhombohedron (rr' = 72 deg. 20'), the
faces of which are generally curved and rough. Botryoidal and stalactitic
masses are more common, or again the mineral may be compact and granular or
loose and earthy. As in the other rhombohedral carbonates, the crystals
possess perfect cleavages parallel to the faces of the rhombohedron. The
hardness is 5; specific gravity, 4.4. The colour of the pure mineral is
white; more often it is brownish, sometimes green or blue: a bright-yellow
variety containing cadmium has been found in Arkansas, and is known locally
as "turkey-fat ore." The pure material contains 52% of zinc, b