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Coal, Iron, Steam, and Illuminating Oil: The Coast Survey Ship Robert J. Walker Returns to Pittsburgh John Cloud NOAA Central Library

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•  “The most favorable days for sounding are those on which the sea is calm, and then the steamer will accomplish the best work, both in amount and quality; but the sailing vessel lies idle for want of motive power”.

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“When sounding in deep water, it is often necessary to lessen the speed in order to get a depth accurately, and to ascertain the character of the bottom. The steam vessel does this easily, without diverging from her track; the sail vessel must change her course and lie to. By this, time is lost, labor is increased, and the continuity of the lines is broken”.

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•  Petroleum oil •  Kerosene •  Colza •  Lard Oil •  Whale Oil (Summer and Winter) •  Sperm Oil

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