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Updated: May 4, 2025
The dredger does not succeed very well in soft silt, because, owing to its slow precipitation, it runs over the sides of the hopper barges without settling. Nor does it do for dredging solid clay. It gives, however, excellent results with sand and gravel, and for this work is much superior to the bucket dredger.
Torbay, as may well be supposed, is an admirable dredging spot; perhaps its two best points are round the isolated Thatcher and Oare-rock, and from the mouth of Brixham harbour to Berry Head; along which last line, for perhaps three hundred years, the decks of all Brixham trawlers have been washed down ere running into harbour, and the sea-bottom thus stored with treasures scraped up from deeper water in every direction for miles and miles.
After some time, he obtained a dredging contract at Port Stanley, Canada, and being very successful in this he entered into it as a permanent business, and appeared among the live men of Cleveland in 1856, as a contractor for dredging the "old river bed". From year to year, this contract for dredging at Cleveland has been continued, and in addition to this, he has executed some immense jobs at Grand Haven, Mich., Erie, Pa., and Milwaukee, Wis., in which he has been uniformly successful.
The Oruktor Amphibolos, or Amphibious Digger, which came out of his shop in 1804, was a steamdriven machine made to the order of the Philadelphia Board of Health for dredging and cleaning the docks of the city. It was designed, as its name suggests, for service either in water or on shore.
I am going to send a new iron surveying steamer round to California in the course of the summer. She will probably start at the end of June. Would you go in her, and do deep-sea dredging all the way round? If so, what companions will you take? If not, who shall go?. . . CAMBRIDGE, February 20, 1871. . . .I am overjoyed at the prospect your letter opens before me.
Gwin-Jeffreys, whose experience in deep-sea dredging makes his opinion valuable, said that telegraph engineers did not sufficiently take account of the sharp stones on the sea bottom, but assumed too readily that they had to deal with a soft bottom only. Mr.
For all these ports of Azof and the mouths of the rivers, besides being closed by ice for at least four months in the year, are so shallow that no amount of dredging can keep back the silting sands, and vessels must anchor at distances of ten to twenty and even thirty miles outside the harbours.
It is true that, issuing from their narrow home on the extreme eastern verge of the Mediterranean, they were the first of all known races to venture forth in floating houses on the bosom of the deep, at first for the purpose of fishing and dredging, but soon also for the prosecution of trade.
The moon appeared to be dredging for oysters amongst the clouds, circling around there by bars, islets, and shoals. Bits of spotted and mackerel-back sky swam like hosts of menhaden through the pearly sheen of the more open aërial main.
During these dredging operations they discovered a number of wooden piles deeply driven into the bed of the lake, and among them a great many hammers, axes, celts, and other instruments. All these belonged to the stone period with two exceptions, namely, an armlet of thin brass wire, and a small bronze hatchet.
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