Show TO SEE THE EARTH MOVE Prof Experiment to Be Repeated at Columbia New ew York Visual proof that the earth revolves is to be made at Colum Columbia Columbia bia bla university In February by Professor sor Harold Jacoby and Professor S H A Mitchell The plan adopted by oy Fou In tn Paris In 1851 1551 is I to be used By B means of a long str from of Pantheon lie hE proved that the plane o oscilla s I I y t I I THE EXPERIMENT T OF PROFESSOR PROFESSOR PROFESSOR SOR FOUCAULT TO SHOW THE SHE 6 REVOLUTION OF THE EARTH The experiment first made by Pro Professor Professor fessor lessor Foucault In 1851 1551 may be easily repeated All that is necessary is an Iron ball baU of considerable weight at attached by b means of a fine wire 40 or r 50 60 feet long to the th ceiling of or a convenient ent nt building The longer the pendulum the better will the experiment be shown The ball should hang just clear of the floor which should be lie covered evenly with fine white sand and a needie nee needle needle dle die fastened to the under side sid f the theban ball ban should touch the sand To stat stait t the ball It should be drawn to one one side sideby sl sideby e eby by a silk thread fastened around Its equator and held in place until quiescent quiescent quiescent cent To release the ball by cutting the thread would give it an uneven mo motion tion so the thread Is severed by b ap applying applying plying the flame of a candle After the ball banhas has been swinging a 11 few thin 4 utes It will be een cen that the needle on the ball is making successive circular lines In the sand thus demonstrating that while the ball Is suspended In space the earth Is turning under It tion of the the pendulum would shift in the same direction as the motion of he sun or opposite in the rotation of the earth In the experiment at Columbia a pen pendulum pendulum pendulum of or piano wire 91 feet long Ions sup supporting supporting supporting porting a heavy weight will be swung In the dome of St Pauls chapel built at the university last year |