A tube for transporting coal-oil.

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1860.  The first suggestion of a pipe-line for transporting oil was made by Gen. S. D. Karns in Nov. 1860.—‘U.S. Tenth Census,’ p. 93.

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1883.  When the tank at a well is nearly full, notice is sent to the nearest agency of the Pipe Line.—E. V. Smalley, ‘Striking Oil,’ Century Mag., xxvi. 332/2 (July). (N.E.D.)

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