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	wind vane wind vane see weather vane .... Read more
	weather vane weather vane or wind vane, instrument used to indicate wind direction. It consists of an asymmetrically shaped object, e.g., an arrow or a rooster, mounted at its center of gravity so it can move freely about a vertical axis. Regardless of the design, the portion of the object with greater... Read more
	wind wind flow of air relative to the earth's surface. A wind is named according to the point of the compass from which it blows, e.g., a wind blowing from the north is a north wind. Wind Direction and Velocity The direction of wind is usually indicated by a thin strip of wood, metal, or plastic (often... Read more
	anemometer anemometer Instrument using pressure tubes or rotating cups, vanes, or propellers to measure the speed or force of the wind.... Read more
	acorn acorn, the small ornamental piece of wood, usually in the shape of either an acorn or a cone, which was fixed on the top of the spindle on the masthead of a sailing vessel which carried the vane. Its purpose was to prevent the vane, which had a very loose-fitting sleeve, from being blown off the... Read more
	Sir Henry Vane Sir Henry Vane 1589-1655, English courtier; father of the Puritan leader Sir Henry Vane, the younger. He gained the favor of James I, was knighted in 1611, and acquired wealth by the purchase of profitable offices. He served in every Parliament from 1614 to 1640 and was successively made... Read more
	meteorology meteorology branch of science that deals with the atmosphere of a planet, particularly that of the earth, the most important application of which is the analysis and prediction of weather . Individual studies within meteorology include aeronomy, the study of the physics of the upper atmosphere;... Read more
	water wheel water wheel device for utilizing the power of flowing or falling water. The Norse wheel is the oldest type known. Despite its name it probably originated in the Middle East, where the swift stream required by this type of wheel is common. The Norse wheel has a vertical shaft directly connected at... Read more
	pelorus pelorus, a circular ring fitted to the rim of a compass bowl and carrying two sighting vanes, used to take azimuths of celestial objects. The ring can be easily revolved and the compass bearing read off by sighting the vanes on the required object. Alternatively, the ring can be fitted to a... Read more
	Sir Henry Vane (statesman) Sir Henry Vane 1613-62, English statesman; son of Sir Henry Vane (1589-1655). Early converted to Puritanism, he went to New England in 1635 and became governor of Massachusetts in 1636. His religious tenets and his support of Anne Hutchinson embroiled him in political quarrels, especially with... Read more