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From an experiment with a spherically shaped piece of lodestone , he concluded
that the entire Earth is a great magnet with its two magnetic poles situated in
regions near the geographical poles ( Figure 1 ) . In the sense of exact science ...
Magnetic observations transient and short - term fields , including telluric currents
component perpendicular to the direction of X ' lying in ( those electric currents on
or near the Earth's surface ) , the ecliptic plane , and Z ' is the northward ...
Attention must be If it is assumed that there is a bar magnet at the Earth's paid , in
the Figure , to the observed fact that the ... In this tion of the Earth , the outer lines
of geomagnetic intensity case , the magnetic moment ( a constant of any bar ...
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LibraryThing ReviewUser Review - keylawk - LibraryThing
This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review