|Institution:||Missouri University of Science and Technology|
|Full text PDF:||http://hdl.handle.net/10355/17831|
"The use of mineral coal dates back before the Christian Era. The mining of coal, however, is much more recent. About the 18th century coal mining began to be scientifically [executed]. The area of Anthracite coal fields in Penn. is not quite 500 square miles included in outcrop lines of its lowest beds" – p. 1.