The Depths of the Sea An Account of the General Results of the Dredging Cruise
The book The Depths of the Sea An Account of the General Results of the Dredging Cruise was written by author C Wyville Charles Wyville Thomson Here you can read free online of The Depths of the Sea An Account of the General Results of the Dredging Cruise book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Depths of the Sea An Account of the General Results of the Dredging Cruise a good or bad book?
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I will therefore describe her dredging gear and the dredging opera- tion carried on from her at the greatest depths in the Bay of Biscay, that which tested our resources most fully, somewhat in detail. The l Porcupine ' is a 382-ton gun-boat, fitted up for the surveying service, in which she has been em- ployed for some years past among the Hebrides, and latterly on the east coast of England. She was assigned for our special work in 1869, with all her ordinary surveying fittings ; and certain v...ery im- portant additions were made; among others the double-cylinder donkey engine, which worked up to about twelve horse-power, with surging drums of different sizes, large drums for bringing up light weights rapidly, and smaller drums for heavy work. This engine was set up amidships, so that lines could be led to the drums either from fore or aft. The donkey-engine proved a most serviceable little machine. We almost always used the large drum, both in dredging and sounding ; and except on one CHAP, vi.
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