Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.
|
See also:MAST (I) (O. Eng. maest; a See also:common See also:Teutonic word, cognate with See also:Lat. See also:malus; from the See also:medieval latinized See also:form mast us comes Fr. See also:malt) , in nautical See also:language, the name of the spar, or straight piece of See also:timber, or See also:combination of spars, on which are hung the yards and sails of a See also:vessel of any See also:size . It has been ingeniously supposed that See also:man himself was the first See also:mast . He discovered by See also:standing up in his prehistoric " dugout," or See also:canoe, that the See also:wind blowing on him would carry his See also:craft along . But the origin of the mast, like that of the See also:ship, is lost in times anterior to all See also:record . The earliest See also:form of mast which prevailed till the See also:close of the See also:middle ages, and is still in use for small vessels, was and is a single spar made of some tough and elastic See also:wood; the conifers See also:supply the best timber for the purpose . In sketching the See also:history of the development of the mast, we must distinguish between the increase in the number erected, and the improvements made in the mast itself . The earliest See also:ships had only one, carrying a single See also:sail . So little is known of the See also:rigging of classical ships that nothing can be affirmed of them with See also:absolute confidence . The Norse vessels carried one mast placed in the middle . The number gradually increased till it reached four or five . All were at first upright, but the mast which stood nearest the See also:bow was by degrees lowered forward till it became the bow-sprit of See also:modern times, and lost the name of mast . The next from the bows became the foremast—called in Mediterranean See also:sea language mizzana, in See also:French misaine . Then came the See also:main-mast—in French See also:grand See also:mat; and then the mizen—in French, which follows the Mediterranean usage, the artimon, i.e . " next the See also:rudder," See also:timon . A small mast was sometimes erected in the very end of the ship, and called in See also:English a " bonaventure mizen." It had a close resemblance to the jigger of See also:yawl-rigged yachts . By the close of the 16th See also:century it had become the established See also:rule that a ship proper had three masts—fore, main and mizen . The third takes its name not as the other two do, from its See also:place, but from the See also:lateen sail originally hoisted on it (see RIGGING), which was placed fore and aft in the middle (See also:Italian, mizzo) of the ship, and did not See also:lie across like the courses and topsails . With the development of very large sailing clippers in the middle of the 19th century a return was made to the practice of carrying more than three masts . Ships and barques are built with four or five . Some of the large schooners employed in the See also:American See also:coast See also:trade have six or seven, and some steamers have had as many . The mast was for See also:long made out of a single spar . Thence the Mediterranean name of " palo " (spar) and the See also:Spanish " arbol " (See also:tree) . The typical Mediterranean mast of " lateen " (Latin) vessels is See also:short and bends forward . In other classes it is upright, or bends slightly backwards with what is called a " See also:rake.' The mast is grounded, or in technical language " stepped," on the kelson (or keelson), the solid timber or See also:metal See also:beam lying parallel with, and above the See also:keel . As the 15th century advanced the growth of the ship made it difficult, or even impossible, to find spars large enough to make a mast . The practice of dividing it into See also:lower, and upper or topmast, was introduced . At first the two were fastened firmly, and the topmast could not be lowered . In the 16th century the See also:top-mast became movable . No date can be given for the See also:change, which was See also:gradual, and was not simultaneously adopted . When the masting of sailing ships was fully See also:developed, the See also:division was into lower or standing mast, topmast, topgallant mast, and topgallant royal . The topgallant royal is a small spar which is often a continuation of the topgallant mast, and is fixed . Increase of size also made it impossible to construct each of these subdivisions out of single timbers . A distinction was made between " whole " or single-spar masts and " armed " and " made masts." The first were used for the lighter spars, for small vessels and the Mediterranean craft called polacras." Armed masts were composed of two single timbers . Made masts were built of many pieces, bolted and " coaked," i.e. dovetailed and fitted together, fastened See also:round by See also:iron hoops, and between them by twelve or thirteen close turns of rope, firmly secured . " Made masts " are stronger than those made of a single tree and less liable to be sprung . The See also:general principle of construction is that it is built round a central See also:shaft, called in English the " spindle " or " upper tree," and in French the mkche or See also:wick . The other pieces—" See also:side trees," " keel pieces," " side fishes," " cant pieces " and " fillings " are " coaked," i.e. dovetailed and bolted on to and around the " spindle," which itself is made of two pieces, coaked and bolted . The whole is See also:bound by iron bands, and between the bands, by rope firmly " woulded " or turned round, and nailed tight . The See also:art of constructing made masts, like that of See also:building wooden ships, is in See also:process of dying out . In sailing men-of-See also:war the mizen-mast often did not reach to the kelson, but was stepped on the orlop See also:deck . Hollow metal cylinders are now used as masts . In the See also:case of a masted See also:screw steamer the masts abaft the engines could not be stepped on the kelson because they would interfere with the shaft of the screw . It is therefore necessary to step them on the lower deck, where they are supported by stanchions, or on a horseshoe covering the screw shaft . The size of masts naturally varies very much . In a 110-See also:gun ship of 2164 tons the proportions of the mainmast were: for the lower mast, length 117 ft., See also:diameter 3 ft . 3 in.; topmast, 70 ft., and 201 in.; topgallant mast, 35 ft., and 11 ii in., 222 ft. in all . At the other end of the See also:scale, a cutter of 200 tons had a lower mast of 88 ft., of 22 in. diameter, and a topgallant mast (there was no topmast between them) of 44 ft., of 94 in. in diameter, 132 ft. in all; topgallant mast of 44 ft., and 91 in. in diameter . The masts of a warship were more lofty than those of a See also:merchant ship of the same See also:tonnage .
At See also:present masts are only used by warships for signalling and military purposes
.
In sailing merchant ships, the masts are more lofty than they were about a century ago
.
A merchant ship of 1300 tons, in 183o, had a main-mast 179 ft. in height; a vessel of the same size would have a mast of 198 ft, to-See also:day.871
A " See also:jury mast " is a temporary mast put up by the See also:crew when the spars have been carried away in a See also:storm or in See also:action, or have been cut away to relieve pressure in a storm
.
The word has been supposed without any See also:foundation to be short for " injury " mast; it may be a See also:mere fanciful sailor See also:adaptation of " jury " in some connexion now lost
.
See also:Skeat suggests that it is short for O
.
Fr. ajourie, See also:Lat. adjutare, to aid
.
There is no See also:reason to connect with jour, day
.
See L
.
Jai, Glossaire Nautique (See also:Paris, 1848) ; See also:Sir See also: |
|
|
[back] MAST (2) (Anglo-Saxon maest, food, common to some T... |
[next] MASTABA (Arab. for " bench ") |
There are no comments yet for this article.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are encouraged.