Popular science monthly . oor-ing-hook pictured be-low pulls, the lesschance there is for theboat to get loose, inuse it is merely neces-sary to toss the hookinto the e\ebolt on thedock or buoy and the\acht is fast, since itautomatically locks, al-though there arc nosprings in thede\ice. Toloosen it a poke of theboat-hook is lock is composedof anordinar\ hook, tothe tip of which isattached a le\-cr,which catches apiece of steel in theshank of the hooknuich as a door-latch is caught. Itcamiot be loosenedunless the upperend of the catch ispushed is accomplish-ed by a
Popular science monthly . oor-ing-hook pictured be-low pulls, the lesschance there is for theboat to get loose, inuse it is merely neces-sary to toss the hookinto the e\ebolt on thedock or buoy and the\acht is fast, since itautomatically locks, al-though there arc nosprings in thede\ice. Toloosen it a poke of theboat-hook is lock is composedof anordinar\ hook, tothe tip of which isattached a le\-cr,which catches apiece of steel in theshank of the hooknuich as a door-latch is caught. Itcamiot be loosenedunless the upperend of the catch ispushed is accomplish-ed by a thrust ofthe fingers or of abt)at-hook in theo|)posite directi(Mi,from that inw hiclithe boat itself ispulling. .Ail pulls on theline itself are tak-en up by thehot) the linebe twisted, so asto ])ull in theo|)posite direc-tion, the pull istaken up 1)\ thelexer which and held. The hnrdt-r tlir boatpulls on the hook theless chiincc it has oflircaking loose fromthis type of mooring Holding the Hudson at Bay. When the project is completed New York will have piers large enough to enablethe worlds largest ocean-liners to dock in a few minutes instead of several hours TO make wa\ for the giant steam-ship piers which when finished willenable the worlds largest ocean-liners to dock within a few minutes,instead of a few hours, which is nowthe case, the Citj of New York, throughits Department of Docks and Ferrieshas constructed a cofferdam which holdssixty-eight feet of the Hudson Ri\Lrat bay while workmen are clearing outrock from the river-bottom and layingthe shore-ends of the piers. The engineering world was muchinterested in the raising of the battleshipMaine in Havana Harbor, where a headof water thirty-seven feet deep had tobe reckoned with, but interest has nowshifted to New York. At Havana thecofferdam was elliptical and the roundedends helped to reinforce the sides. InNew York the wall holding back thewaters is L-shaped, eight hundred feetlong on one side and t
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
