Among
different bituminous substances, the names _naphtha_ and _petrolium_
have been given to those which are fluid, _maltha_, to that which has
the consistence of pitch, and _asphaltum_ to that which is solid.
_Blight_: A disease in plants by which they are blasted, or prevented
from producing fruit.
_Blonde lace_: Lace made of silk.
_Blood heat_: The temperature which the blood is always found to
maintain, or ninety-eight degrees of Fahrenheit's thermometer.
_Blue vitriol_: Sulphate of copper.
_Blunts_: Needles of a short and thick shape, distinguished from
_Sharps_, which are long and slender.
_Booking_: A kind of thin carpeting or coarse baize.
_Botany_: (From a Greek word signifying an herb,) a knowledge of
plants; the science which treats of plants.
_Brazil wood_: The central part or heart of a large tree which
grows in Brazil, called the _Caesalpinia echinata_. It produces
very lively and beautiful red tints, but they are not permanent.
_Bronze_: A metallic composition, consisting of copper and tin.
_Brulure_: A French term, denoting a burning or scalding; a blasting of
plants.
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