Show to a knife tako take a pocket or a table knife and lay its blado blade flat uon upon tho the back of a fire shovel with a pair of tongs hold firmly in the hand rob the blado blade vigorously and always in the same direction from point to base turn tho the blade over now and then so that the friction may be applied to both sides after a rubbing of from forty to fiat seconds the blado blade will be magnetized and will bo be capable of lifting a needle with which it ie is placed in contact point to point the magnetization will last ansta a long time this ills experiment which is not put down in work works on physics ica is ver very y and worthy of study saturn N atu m |