WIND

—All weather proce es depend ultimately on air-motion, i.e wind, and w. naturally blows from re~ gions of high barometric pre ure to those of low pre ure, but not directly. If pre ure is set out on isobars the we. is almost parallel to them, but slightly inclined to the regions of lower pre ure. The force of w. is measured on the scale from 1 to 12, the lowest and kighes6 grades being easy to a e , but the intere mediate demand experience. Speed of w. is detected by the anemometer; & speed of 40 miles per hour would cause damage to property, w.'s of beyond 80 miles per hour are rarely experienced in America. Wind force is inversely proportional to the distance between isobars. The upper air has been in+ creasingly studied in recent years (see METEOROLOGY).