Show i The 1lh nIIu Millnn Everybody Knows that the earth make ono complete revolution on lit nxla once In each twentyfour hour hut Sty however halo any Idea of tbo lilRb robe ot speed at bleb niich an Im mensa ball mutt turn In order to accomplish ac-complish thin font of making one revolution revolu-tion In n day nnd a night A graphic Idcn of the terrible pace I which Iho old < 1 earth keeps us year after year may I bo bad b > comparing Its speed to that i of n cannon ball fired from A modern blghprcHiiro gun The highest cloc Ity cir nttnlncd l by such A mUtllo lint been estimated at 163 feet per second i which It I equal to n mile In threo and twotenths second Tho earth In making mak-ing one complete revolution In tho abort space of tnintyfour hours mutt turn with n velocIty almost exactly equal to that of tho cannon ball In abort Ita rate of speed nt tho equator la I exactly 1 507 feet per second Thla la I equal to a mile every three anti alxtcntbt icc oniU seventeen mIme a minute |