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Its History, Chemistry, Mineralogy, Geology, Metallurgy, Uses, Preparations, Analysis, Production, and Valuation; With Complete Bibliographies. for..

A Statement Of The Facts Connected With The Emma Mine, Its Sale To The Emma Silver Mining Company, Limited, Of London And Its Subsequent History And..

Their Origin, History, Geology, and Chemistry

On the Coal Lands, Mines and Improvements of the Dauphin and Susquehanna Coal Company, and of the Geological Examinations, Present Condition and..

Its Resources and Opportunities for Investment

A History Of The Oil Region Of Venango County, Pennsylvania: Its Resources, Mode Of Development, And Value: Embracing A Discussion Of Ancient Oil..