daynoir: bar magnet
daynoir: magnetic field shown by iron filings
daynoir: magnetic field shown by iron filings
daynoir: iron filings tracing the magnetic field of a bar magnet
daynoir: bar magnets - like poles facing
daynoir: bar magnets - opposite poles facing
daynoir: attract-1
daynoir: attract-2
daynoir: repel 1
daynoir: repel 2
daynoir: what you need to make a needle compass
daynoir: the working needle compass
daynoir: compass needle
daynoir: why you can plot magnetic fields
daynoir: bar magnet on a compass array
daynoir: magnetic field shown by compass needles
daynoir: magnetic field lines with compass needles
daynoir: magnetic field lines
daynoir: magno-graph
daynoir: magno-graph image
daynoir: magno-graph
daynoir: magno-graph - pen pivot
daynoir: magno-graph - annotated pen pivot
daynoir: magno-graph in action
daynoir: magno-graph picture 1
daynoir: magno-graph picture 2
daynoir: magno-graph - placing the magnets
daynoir: magno-graph - positioning the magnets
daynoir: magno-graph picture 5
daynoir: magno-graph pen lifting 2