s a sensible agitation of the atmosphere, oc- casioned by a quantity of air flowing from one place to another. See Meteorology.

Hot Winds. See SAMUEL.

Wind Flower. See ANEMONY, Botany Index.

Wind-Mill, a kind of mill, the internal parts of which are much the same with those of a water mill: from which, however, it differs, in being moved by the impulse of the wind upon its sails or vanes, which are to be considered as a wheel in axis. See MECHA- NICS INDEX.

Wind Gage. See Wind-Gage.

Wind-Galls. See Farriery Index.

Wind-Gun. See Air Gun, under SCIENCE, Amuse- ments of.

Instruments for measuring the strength, velocity, &c. of the Wind. See Wind-Gage, Anemometer and Anemoscope.

Wind-Hatch, in mining, a term used to express the place at which the ore is taken out of the mines.

Wind-Shock, a name given by our farmers to a dis- temper to which fruit trees, and sometimes timber trees, are subject. It is a sort of bruise and shiver throughout the whole substance of the tree; but the bark being of- ten not affected by it, it is not seen on the outside, while the inside is twisted round, and greatly injured. It is by some supposed to be occasioned by high winds; but others attribute it to lightning. Those trees are most usually affected by it whose boughs grow more out on one side than on the other. The best way of preven- ting this in valuable trees, is to take care in the planta- tion that they are sheltered well, and to cut them fre- quently in a regular manner while young.

Wind-Taught, in sea language, denotes the same as stiff in the wind. Too much rigging, high masts, or anything catching or holding wind aloft, is said to hold a ship wind-taught; by which they mean, that she stoops too much in her sailing in a stiff gale of wind. Again, when a ship rides in a main stress of wind and weather, they strike down her top masts, and bring her yards down, which else would hold too much wind, or be too much distended and wind-taught.

Wind-Sails, a sort of wide tube or funnel of canvas, employed to convey a stream of fresh air downward in- to the lower apartments of a ship.

This machine is usually extended by large hoops situated in different parts of its height. It is let-down per- pendicularly through the hatches, being expanded at the lower end like the base of a cone; and having its upper side open on the side which is placed to windward, so as to receive the full current of wind; which entering the cavity, fills the tube, and rushes downwards into the lower regions of the ship. There are generally three or four of these in our capital ships of war, which, together with the ventilators, contribute greatly to preserve the health of the crew.

Windage of a Gun, is the difference between the diameter of the bore and the diameter of the ball.