TY  - BOOK
AU  - Royal Institution of Great Britain.
AU  - ragg, Lawrence.
TI  - Magnetism
KW  - Magnetism
KW  - Study and teaching
N1  - Part One of a two-part film on magnetism which looks at Faraday's idea of a magnetic field or how the presence of the magnet makes a difference to the space it surrounds by giving it magnetic effects, and how you can map out the direction of the magnetic force by the lines along which a compass sets itself by means of iron filings
ER  -