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Bolometer – Bone Bed

Bolometer

a most sensitive electrical instrument invented by Svanberg in 1851 for the measurement of radiant heat.

Bolor Tagh

also BILAUR, or

Bolton

or BOLTON-LE-MOORS, an important English manufacturing town and parliamentary and municipal borand parliamentary and municipal bor- 11 miles N. W. of Manchester. The river Croal divides the town into Great and Little Bolton. It was celebrated as far back as the time of Henry VIII. for its Free State, on the right bank of the

Boma

city and capital of the Kongo Kongo river, till 1876 was the extreme Free State, on the right bank of the ment of the governor-general and also guese traders. It contains the establishthe local government of the administrative district of the same name. bomb shell; a hollow iron ball, spheroid,

Bombazine

a mixed silk and woolen twilled stuff, the warp consisting of silk and the weft of worsted. Black bombazine has been much in use for mourning garments.

BOMBIDÆ, a family of hymenopterous insects, containing the humble or bumble bees.

Bombyx

the genus of moths to which the silk worm moth (B. mori) belongs.

Bonar

HORATIUS, a celebrated Scotch hymnist, born in Edinburgh , Dec. 19, 1808; wrote "Hymns of Faith and Hope," many of which have been taken into the hymnals of most of the Protestant Churches. He also wrote more than 20 volumes on theological and religious subjects. He died July 31, 1889 .

Bona Vista

a bay, cape, and town on the E. coast of Newfoundland. The town is a port of entry, and one of the oldest settlements in the island.

Bonded Warehouses

places where taxable imports or manufactures may be left in government custody, under bond for payment of the duty, till the importer or manufacturer is prepared to make full payment of duty. The system was designed to promote commerce and certain manufactures by lessening the pressure on the importer or manufacturer by means of instalment payments of duty.

Bondu

or BONDOU, a former kingdom of west Africa, in Senegal; now a French protectorate; capital, Bulibani, on the Falemé river. It has a luxuriant vegetation, magnificent forests, and is in many parts under good culture, producing large crops of cotton, millet, maize, indigo, tobacco, etc. The inhabitants are principally the Fulah tribe, and are estimated at about 1,500,000.

Bone Ash

ash made of calcined bones. It consists chiefly of tricalcic phosphate Ca" (PO4)2"", mixed with about one-fourth its weight of magnesium phosphate and calcic carbonate.

Bone Bed

in geology, a bed containing numerous fragments of fossil bones, teeth, etc.