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KF5JRV > TECH 20.10.16 13:33l 6 Lines 252 Bytes #999 (0) @ WW
BID : 3911_KF5JRV
Read: GUEST
Subj: Magnetized Needles
Path: IW8PGT<IZ3LSV<F1OYP<ON0AR<GB7CIP<N0KFQ<KF5JRV
Sent: 161020/1124Z 3911@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
Magnetized Needles
Magnetized needles used as direction pointers instead of the spoon-shaped
lodestones appeared in the 8th century AD, again in China, and between 850 AD
and 1050 AD they seem to have become common as navigational devices on ships.
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