{HEAD ~ Iron filings} 58 are sprinkled around {TAIL ~ the L} shaped rod 30 and toroid magnets 42 and 44 to illustrate the modification effect of the magnetic lines of force 
{ HEAD ~ Iron filings } 58 are sprinkled around { TAIL ~ the L } shaped rod 30 and toroid magnets 42 and 44 to illustrate the modification effect of the magnetic lines of force
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH