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candle made of paraffine. -- Mineral caoutchouc, an elastic mineral pitch, a variety of bitumen, resembling caoutchouc in elasticity and softness. See Caoutchouc, and Elaterite. -- Mineral chameleon (Chem.) See Chameleon mineral, under Chameleon. -- Mineral charcoal. See under Charcoal. -- Mineral cotton. See Mine…

A brown color obtained from bitumen. See Mummy brown (below).

French chemist, in 1829. It depends upon the action of light in rendering a thin layer of bitumen, with which the plate is coated, insoluble.

Containing no bitumen; not bituminous.

Earth pitch; a soft, black bitumen of the consistence of tar, and of a strong smell. It is inflammable, and intermediate between petroleum and asphalt. [Written also pisasphaltum, pisasphalt, etc.]

resinous exudation of the hemlock tree (Abies Canadensis); hemlock gum. -- Jew's pitch, bitumen. -- Mineral pitch. See Bitumen and Asphalt. -- Pitch coal (Min.), bituminous coal. -- Pitch peat (Min.), a black homogeneous peat, with a waxy luster. -- Pitch pine (Bot.), any one of several species of pine, yielding…

alum. -- Bituminous slate (Min.), a soft species of sectile clay slate, impregnated with bitumen. -- Hornblende slate (Min.), a slaty rock, consisting essentially of hornblende and feldspar, useful for flagging on account of its toughness. -- Slate ax or axe, a mattock with an ax end, used in shaping slates for roof…

Bitumen. [Archaic] Slime had they for mortar. Gen. xi. 3.

aining it. Coal tar. See in the Vocabulary. -- Mineral tar (Min.), a kind of soft native bitumen. -- Tar board, a strong quality of millboard made from junk and old tarred rope. Knight. -- Tar water. (a) A cold infusion of tar in water, used as a medicine. (b) The ammoniacal water of gas works. -- Wood tar, tar obt…