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Scientific American, Vol. 87, No. 5 (1902) (1902)
leaf 4
the left. The travel- paratively quiet during the existence of a fog, this ing contact is fixed inside the outer drum and presses latter apparatus is of little value at the time when on the spiral bridge below it. It is advanced by turn- the sounding of the bell is most essential. The appa- ing the… … is possible with a con- boilers, © 1902 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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