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Show Velc-cKy of Wind. In meteorological terms a strcr.f wind Is anything from t to J7 cilfs an hour; a gale from SS to 55 milcs. and a storm from 5S to 75 miles. Fe-yor.d Fe-yor.d that It may be desorihed s a hurricane. In the convulsion which destroyed the Tay bri.ise in Fecemher. 1ST. the anemometer registered of wind which exceeJed ICO tulles an hour. The connection between the velocity ve-locity and the pressure cf the wind Is not yot known wiih absolute certainty, cer-tainty, but rov.ghly sresfclr.g iwi-d of id miles! rroduoes a prx-ssure of eight pounds to the square foot s-d M miles a pressure of l. pvuri'.s, Th I'rltlsh Association Committee on Wiiul Pressure has recorded cases of eight to ninety pov.r.ils to the sv.sr foot. London r-nronlcle. |