| |
KF5JRV > TECHNI 07.10.16 12:16l 11 Lines 466 Bytes #999 (0) @ WW
BID : 3204_KF5JRV
Read: GUEST
Subj: Magnetite
Path: IW8PGT<IR2UBX<DB0RES<PI8CDR<GB7YEW<N9LYA<N0KFQ<KF5JRV
Sent: 161007/1106Z 3204@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
Ferrites or magnetic oxides are stones that attract iron and other metals.
These are natural magnets and are not inventions. However, the machines
that we make with magnets are inventions.
Ferrites were first discovered thousands of year ago. Large deposits were
found in the district of Magnesia in Asia Minor, giving the mineral's name
of magnetite (Fe3O4).
Magnetite was nicknamed lodestone and used by early navigators to locate
the magnetic North Pole.
Read previous mail | Read next mail
| |
