The Practical mechanic's journal . n doing this,he has fixed upon a branch of employment which has too truly stood inneed of a helping hand; for apathy, prejudice, and, to no small extent,idleness, have conspired to keep it in a position most disgracefully refer to the deep-sea fishery with the trawl-net. By a perseveringattention to the minutiae of this fishery, Mr. Dempster has succeeded iureJucing the English system to practice here, and has added importantimprovements to the old trawl-net, bringing the matter to such a point,that nothing now remains to prevent its actual prosecution
The Practical mechanic's journal . n doing this,he has fixed upon a branch of employment which has too truly stood inneed of a helping hand; for apathy, prejudice, and, to no small extent,idleness, have conspired to keep it in a position most disgracefully refer to the deep-sea fishery with the trawl-net. By a perseveringattention to the minutiae of this fishery, Mr. Dempster has succeeded iureJucing the English system to practice here, and has added importantimprovements to the old trawl-net, bringing the matter to such a point,that nothing now remains to prevent its actual prosecution, but the un-exploded falsities of prejudice. We cannot better explain Mr. Dempstersviews than by quoting his own account of his labours in the organiza-tion and development of this branch of trade—explaining, in the firstplace, his proposed modification of the trawling apparatus for deep water,which we lately had the pleasure of examining in Edinburgh. Fig. 1 is a perspective view of the apparatus complete, as in the act of trawling, a, Is the span, attached at each end to the extremities ofthe timber beam, b; c c, are the crank-rods, or stretchers, 10 feet inlength, rove through holes in the upper and lower parts of the trawl-heads,d d, and secured with pins or nuts. The trawl-heads are of angle-iron,bent into an oval, 5 feet long, by 2 feet C inches deep. E e, Is the netframe of rod-iron, jointed to the trawl-heads; p, the receiving-bag-net. The crank-rods, c c, work loosely in the eyes of the trawl-heads; andwhen the net falls, the one that comes upon the ground presses its weightthereon, and adds to the facility of capture. The bag, or receiving-net,is fastened to these rods, and whatever side the apparatus falls upon, theentrance to the bag-net is always open, and the frame, E, prevents thesweeping forward of the apparatus by the current. The span is eitherof rod-iron or rope. A few months since, I wrote a short pamphlet on the subject of trawl-fishing, giving a
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Keywords: ., bookcentury1800, bookdecade1840, bookidpra, booksubjecttechnology
