The Sailor's Word-Book Part 136

IRON-BOUND BLOCKS. Those which are fitted with iron strops.

IRON-CLAD, CASED, COATED, OR PLATED VESSEL. One covered entirely, or in special parts, with iron plates intended to resist ordinary missiles.

Where parts only are so protected, of course it may be done more effectually.

IRON GARTERS. A cant word for bilboes, or fetters.

IRON-HORSE. The iron rail of the head; the horse of the fore-sheet or boom-sheet traveller.

IRON-PLATED s.h.i.+PS. _See_ ARMOUR-CLAD.

IRONS. A s.h.i.+p is said to be in irons when, by mismanagement, she is permitted to come up in the wind and lose her _way_; so that, having no steerage, she must either be boxed off on the former tack, or fall off on the other; for she will not cast one way or the other, without bracing in the yards. Also, _bilboes_ (which see). Also, the tools used by the caulkers for driving oak.u.m into the seams. (_See also_ BOOM-IRONS.)

IRON-SICK. The condition of vessels when the iron work becomes loose in the timbers from corrosion by gallic acid, and the speeks or sheathing nails are eaten away by rust.

IRON-SIDES. Formerly a sobriquet for favourite veteran men-of-war, but latterly applied to iron and iron-clad s.h.i.+ps.

IRON WEDGES. Tapered iron wedges on the well-known mechanical principle, for splitting out blocks and for other similar purposes.

IRON-WORK. A general name for all pieces of iron, of whatever figure or size, which are used in the construction and equipment of s.h.i.+ps.

IRREGULAR BASTION. One whose opposite faces or flanks do not correspond; this, as well as the constant irregularity of most real fortification, is generally the result of the local features of the neighbourhood.

ISLAND. May be simply described as a tract of land entirely surrounded with water; but the whole continuous land of the Old World forms one island, and the New World another; while ca.n.a.ls across the isthmuses of Suez and Panama would make each into two. The term properly only applies to smaller portions of land; and Australia, Madagascar, Borneo, and Britain are among the larger examples. Their materials and form are equally various, and so is their origin; some having evidently been upheaved by volcanic eruption, others are the result of accretion, and still more revealing by their strata that they were formerly attached to a neighbouring land. The sudden emergence of Sabrina, in the Atlantic, has occasioned wonder in our own day. So has that of Graham's Island, near the south coast of Sicily; and the Archipelago is daily at work.

ISLAND HARBOUR. That which is protected from the violence of the sea by one or more islands or islets screening its mouth.

ISLAND OF ICE. A name given to a great quant.i.ty of ice collected into one solid ma.s.s and floating upon the sea; they are often met with on the coasts of Spitzbergen, to the great danger of the s.h.i.+pping employed in the Greenland fishery.

ISLE. A colloquial abbreviation of _island_.

ISLE OF WIGHT PARSON. A cormorant.

ISLET, OR ISLOT. Smaller than an island, yet larger than a key; an insular spot about a couple of miles in circuit.

ISOSCELES. A triangle with only two of its sides equal.

ISSUE. The act of dispensing slops, tobacco, beds, &c., to the s.h.i.+p's company; a distribution.

ISSUE-BOOK. That which contains the record of issues to the crew, and the charges made against them.

ISTHMUS. A narrow neck of land which joins a peninsula to its continent, or two islands together, or two peninsulas, without reference to size.

The Isthmus of Suez alone prevents Africa from being an island, as that of Darien connects the two Americas.

IURRAM. A Gaelic word signifying a boat-song, intended to regulate the strokes of the oars. Also, a song sung during any kind of work.

IVIGAR. A name in our northern isles for the sea-urchin, _Echinus marinus_.

IVORY GULL, OR SNOW-BIRD. The _Larus eburneus_ of Arctic seas. It has a yellowish beak, jet black legs, and plumage of a dazzling white.

J.

JAB, TO. To pierce fish by prodding.

JABART. A northern term for a fish out of season.

JABB. A peculiar net used for catching the fry of the coal-fish.

JACK. In the British navy the jack is a small _union_ flag, formed by the intersection of St. George's and St. Andrew's crosses (which see), usually displayed from a staff erected on the outer end of a s.h.i.+p's bowsprit. In merchant s.h.i.+ps the union is bordered with white or red.

(_See_ UNION-JACK.) Also, a common term for the jack or cross-trees.

Also, a young male pike, _Esox lucius_, under a foot in length. Also, a drinking vessel of half-pint contents. (_See_ BLACK-JACK.)--_Jack_, or _Jack Tar_, a familiar term for a sailor. A fore-mast man and an able seaman. It was an early term for short coats, jackets, and a sort of coat-of-mail or defensive lorica, or upper garment.

JACK ADAMS. A stubborn fool.

JACK AFLOAT. A sailor. Euripides used almost the same term in _floater_, for a seaman.

JACKa.s.sES. Heavy rough boats used in Newfoundland.

JACKa.s.s PENGUIN. A bird, apt while on sh.o.r.e to throw its head backwards, and make a strange noise, somewhat resembling the braying of an a.s.s.

JACK-BARREL. A minnow.

JACK-BLOCK. A block occasionally attached to the topgallant-tie, and through which the top-gallant top-rope is rove, to sway up or strike the yard.

JACK-BOOTS. Large coverings for the feet and legs, outside all, worn by fishermen.

JACK CROSS-TREES. Single iron cross-trees at the head of long topgallant-masts, to support royal and skysail masts.

JACKEE-JA. A Greenland canoe.

JACKET. A doublet; any kind of outer coat.--_Cork jacket_, is lined with cork in pieces, in order to give it buoyancy, and yet a degree of flexibility, that the activity of the wearer may not be impeded in swimming.

JACKETS. The casings of the pa.s.sages by which steam is delivered into the cylinders of steam-engines. They are non-conductors of heat to check its escape.

JACKETTING. A starting, or infliction of the rope's-end.

JACK-HERN. A name on our southern coasts for the heron.

JACKING. Taking the skin off a seal.

JACK IN OFFICE. An insolent fellow in authority.

JACK IN THE BASKET. A sort of wooden cap or basket on the top of a pole, to mark a sand-bank or hidden danger.

JACK IN THE BOX. A very handy engine, consisting of a large wooden male screw turning in a female one, which forms the upper part of a strong wooden box, shaped like the frustum of a pyramid. It is used by means of levers pa.s.sing through holes in it as a press in packing, and for other purposes.