BENZENE n.
ained in the naphtha produced by the destructive distillation of coal, from which it is separated by fractional distillation. The name is sometimes applied also to the impure commercial product or benzole, and also, but rarely, to a similar mixed product of petroleum. Benzene nucleus, Benzene ring (Chem.), a closed cha…
BIRD n.
ect of the group Mallophaga, of which the genera and species are very numerous and mostly parasitic upon birds. -- Bird mite (Zoöl.), a small mite (genera Dermanyssus, Dermaleichus and allies) parasitic upon birds. The species are numerous. -- Bird of passage, a migratory bird. -- Bird spider (Zoöl.), a very large S…
BLANCHARD LATHE n.
s, gun stocks, lasts, spokes, etc., after a given pattern. The pattern and work rotate on parallel spindles in the same direction with the same speed, and the work is shaped by a rapidly rotating cutter whose position is varied by the pattern acting as a cam upon a follower wheel traversing slowly along the pattern.…
BLANCMANGE n.
A preparation for desserts, etc., made from isinglass, sea moss, cornstarch, or other gelatinous or starchy substance, with mild, usually sweetened and flavored, and shaped in a mold.