Show Magnets Magnet Are Used To Clean Crop Seed Industrial research has de devel developed vel a method of screening weed seed from crop seeds The first step in the process Isto is isto isto to spray the seed seed clover clover for In Instance in in- stance with stance with a fog of wet iron particles The particles stick to the softer rougher weed seeds and slide off olf the hard clover seeds When the seed Is run over overa a magnet the iron bon particles with weed seeds attached are dragged out and the clover seed can be bagged Two seed companies have tested the process and find it a success Magnets also are being used to clear roads of ot nails and other metal objects which might puncture puncture puncture ture tires Ures That process was developed developed de de- during World War II 11 when enemy planes began sowing Bowing Allied air strips strip with bits of ot metal shaped like childrens children's jacks The metal punctured airplane tires and caused accidents The Minnesota Highway Department Department Depart Depart- ment has mounted bar shaped bar shaped magnets on trucks to hang bang about five inches above the surface of ot the road and grab erab up tacks nails naUs wire bolts screws screw A mile 75 75 1 mlle mile sweep is 11 reported to have collected collect ed pounds of ot such uch Junk |