Show u s u if sift 1 ss s UJ I fi rass n tt t la s tt u Ul n tt u u un e r. r u s. s u tt ss u I High Buildings Cause of Freak Whirlwinds I Interesting One may furry learn many ninny things about air currents and the wa way b by watching the rote move movement storms develop or nr pert perhaps ment ol of pieces piece of lit paper whirled about the tiro his huh hat us as It Is of lit miniature windstorms wind windstorms sheet A variety by hy the high build buildIngs storms ure ure lIt caused forms of or the cities Ings lugs of If our study which well repay tJ Uri Oil Oil Oila a n hot day duty wh when when U the till air Is per It be- be atmosphere as lI quiet the nines ollies heated un tends s m to rise along I the and nod If It It buildings nicks hies of rocks or li h li it Ill develops lulu Into IU ravels elf high t ii i strong wind WIlI which descends de c ulIs on the 11 lIf I de ii mil lid M queer cr pranks ullin l e S small us s iu the flit t il 11 II wind wIlle U u cor cur net formed by several buildings As I time the wind travels down dow I a 0 street e espe especially dully dally a 0 narrow one It increases In III Increases I creases In velocity A little will t spill iII Into Info the side streets but the tare main mainstream stream will flow now on gathering 1 turn tofu Observe this wind wlm strike against I Ithe the side of a 0 high building and nud notice c chow how It mushrooms out u on nn n all sides splitting mien Into many air currents lord and to buthe hut but trace these till they come rest st he be sure to hold tightly to your our hat hut In Iu Inthe inthe the meantime |