DECEMBER 13 1879.] 377 ever, although he cannot swell the fibers of the hide with are exceptionally brave and capable navigators, who take I The cable was constructed by Messrs. Siemens Brothers, tannin to the extent above noted, must produce a firm, solid an honest and honorable pride in their work; but there can 10f England, and is considerably stronger than any of the article, with not a little of the elasticity and strength of be no qnestion of the fact that their exclusive devotion to

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... s previously laid. The central wire of copper is sur· steel; it must be sufficiently flexible, and yet of great power I sails is a mistake. The adoption of steam pilot boats for I rounded by ten copper wires, twisted, insuring absolute con· to resist wear by attrition, and to stand, with little stretch· inshore service cannot fail to prove advantageous to our [ I ductivity in all weather. For insulating purposes three en· ing, the heaviest direct strain. These qualities are best ob· shipping, now 'frequently delayed by calms, darkness, ad· velopes of gutta percha surround the wire, and outside of tained by an amount of tanning which will make the finished verse winds, or ice, against which sails are unable to con-I the gutta percha is placed a wrapping of manila hemp leather but little thicker than the raw hide of which it is tend successfully. In such cases, steam pilot boats must be treated with Chatterton's compound. An armor of steel made. On cutting a piece of sole or belting leather, one much more promptly serviceable; and the sailing pilots ad· wire for protection is outside the hemp, the wires composing will notice the network of hide fi bers interlacing each other, mit the fact when they protest so vigorously that steam will the armor being laid in..a peculiar manner, side by side, so and which, before tanning� were surrounded with gelatine.