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Average mining depth, however, is 1,150-1,300 feet (350-400 m). After several
largely unsuccessful efforts to establish a metallurgical industry on the coalfield,
an ironworks was set up in 1872 by a Welshman, John Hughes. During the
Laid out in 1887, its industrial development was stimulated by construction of
Indiana Harbor, connected with the Grand Calumet River by a 3-mile (5-kilometre
) ship canal and including an extensive system of docks. Its densely concentrated
New industries have created new needs. The instruction of airline flight
attendants has become a highly developed operation for the major airlines.
Television and sound-broadcasting organizations have introduced training
schemes to ...
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review