History
Balloon loops were first introduced on metro and tram lines. They did not appear on freight railways in large numbers until the 1960s when the modernising British Rail introduced merry-go-round (MGR) coal trains that operated from mines to power stations and back again without shunting.
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—Henry Brooks Adams (1838–1918)
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“Anything in history or nature that can be described as changing steadily can be seen as heading toward catastrophe.”
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