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BALLAST (O. Swed. barlast, perhaps fr...

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Originally appearing in Volume V03, Page 269 of the 1911 Encyclopedia Britannica.
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BALLAST (O. Swed. barlast, perhaps from See also:bar, See also:bare or See also:mere, and last, load)  , heavy material, such as See also:gravel, See also:stone or See also:metal, placed in the hold of a See also:ship in See also:order to immerse her sufficiently to give adequate stability . In See also:botany " See also:ballast-See also:plants " are so-called because they have been introduced into countries in which they are not indigenous through their seeds being carried in such ballast . A ship " in ballast " is one which carries no paying See also:cargo . In See also:modern vessels the See also:place of ballast is taken by See also:water-tanks which are filled more or less as required to See also:trim the ship . The See also:term is also applied to materials like gravel, broken slag, burnt See also:clay, &c., used to See also:form the See also:bed in which the sleepers or ties of a railway track are laid, and also to the See also:sand which a balloonist takes up with him, in order that, by throwing portions of it out of the See also:car from See also:time to time, he may lighten his See also:balloon when he desires to rise to a higher level .

End of Article: BALLAST (O. Swed. barlast, perhaps from bar, bare or mere, and last, load)
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