ANTHRACITE COAL World Regions,1894 Antique Colour Map

HISTORICAL MINING MAP

Anthracite (Greek, literally "a form of coal", from Anthrax coal) is a hard, compact variety of mineral coal that has a high luster. It has the highest carbon count and contains the fewest impurities of all coals, despite its lower calorific content. Anthracite coal is the highest of the metamorphic rank, in which the carbon content is between 92% and 98%. The term is applied to those varieties of coal which do not give off tarry or other hydrocarbon vapours when heated below their point of ignition. Anthracite ignites with difficulty and burns with a short blue flame, without smoke. Other terms having the same meaning are blue coal, hard coal, stone coal (not to be confused with the German Steinkohle), blind coal (in Scotland), Kilkenny coal (in Ireland), and black diamond. The imperfect anthracite of north Devon, which however is only used as a pigment, is known as culm, the same term being used in geological classification to distinguish the strata in which it is found, and similar strata in the Rhenish hill countries which are known as the Culm Measures. In America, culm is used as an equivalent for waste or slack in anthracite mining. THERE IS A DESCRIPTION ON THE BACK OF THE MAP IN GERMAN TEXT REFERING TO THE MAP.

1890s Wood Engraving, Antique Map

Approximate Overall Size: 12 X 9 1/2 inches

CONDITION: Book Plate Map - Excellent Condition.German Text. Beautiful with excellent detail. FOLDED LARGE DOUBLE PAGE MAP - TEXT ON THE BACK SIDE