tine in character. There is a perfect cleavage parallel to the
plane of symmetry of the crystals. Hardness 4-4-1/2; specific gravity
2.42. The mineral was first discovered in 1882 in Death Valley, Inyo
county, California, and in the following year it was found in greater
abundance near Daggett in San Bernardino county, forming with other
borates and borosilicates a bed in sedimentary strata of sandstones and
clays; in more recent years very large masses have been found and worked
in these localities, and also in Los Angeles county (see Special Report,
1905, of U.S. Census Bureau on _Mines and Quarries_; and _Mineral
Resources of the U.S._, 1907).

Priceite and pandermite are hydrous calcium borates with very nearly the
same composition as colemanite, and they may really be only impure forms
of this species. They are massive white minerals, the former friable and
chalk-like, and the latter firm and compact in texture. Priceite occurs
near Chetco in Curry county, Oregon, where it forms layers between a bed
of slate and one of tough blue steatite; embedded in the steatite are
rounded masses of priceite varying in size from that of a pea to masses
weighing 200 lb. Pandermite comes from Asia Minor, and is shipped from
the port of Panderma on the Sea of Marmora: it occurs as large nodules,
up to a ton in weight, beneath a thick bed of gypsum.

Another borate of commercial importance found abundantly in the
Californian deposits is ulexite, also known as boronatrocalcite or
"cotton-ball," a hydrous calcium and sodium borate, CaNaB5O9 + 8H2O,
which forms rounded masses consisting of a loose aggregate of fine
fibres. It is the principal species in the borate deposits in the
Atacama region of South America. (L. J. S.)

COLENSO, JOHN WILLIAM (1814-1883), English bishop of Natal, was born at
St Austell, Cornwall, on the 24th of January 1814. His family were in
embarrassed circumstances, and he was indebted to relatives for the
means of university education. In 1836 he was second wrangler and
Smith's prizeman at Cambridge, and in 1837 he became fellow of St
John's. Two years later he went to Harrow as mathematical tutor, but the
step proved an unfortunate one. The school was just then at the lowest
ebb, and Colenso not only had few pupils, but lost most of his property
by a fire. He went back to Cambridge, and in a short time paid off heavy
debts by diligent tutoring and the proceeds of his series of manuals of
algebra (1