MAGNETISM
benefits: g78 1/8 17, 20-22
cause: g78 1/8 18-19
celestial: g78 1/8 19-20
characteristics: g78 1/8 17-18
discussion: g78 1/8 17-22; g69 3/22 12-17
earth’s magnetic field: g79 6/22 18-19
magnetic material in living things: ce 155-156; g82 2/22 31; g80 1/22 24; g80 5/22 24
relationship to electricity: g78 1/8 20-21
sunspots: g69 7/8 10-13
use of, in ancient weapons detection: g75 6/8 24