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underground
Scientific American 1899-10-21
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(288 x 432)
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(397 x 594)
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(650 x 972)
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Created on
Tuesday 2 February 2010
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915
Tags
commuter
,
network
,
rapid transit
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transport
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transportation
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underground
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Scientific American
The new Philadelphia subway and tunnel. 40-inch water pipes. Reconstruction of part of the Baldwin Locomotive Shops. View in tunnel.
Source: Steve Kirch, collector, and creator of a great
website about SCIENTIFIC AMERICAN
in the past
Restoration by: magscanner
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