bush

The Sailor's Word-Book

I.


, or bouche

A circular shouldered piece of metal, usually of brass, let into the lignum vitæ sheaves of such blocks as have iron pins, thereby preventing the sheave from wearing, without adding much to its weight. The operation of placing it in the wood is called bushing or coaking, though the last name is usually given to smaller bushes of a square shape. Brass bushes are also extensively applied in the marine steam-engine work. Also, in artillery, the plug (generally of copper, on account of the superior resistance of that metal to the flame of exploded gunpowder), having a diameter of about an inch, and a length equal to the intended length of the vent, screwed into the metal of the gun at the place of the vent, which is then drilled in it. Guns may be re-bushed when the vent has worn too large, by the substitution of a new bush.

II.

The forests in the West Indies, Australia, &c.

The Sailor's Word-Book

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