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( C.B.H. ) Earth , Gravitational Field of The gravitational field , or gravity , of the
Earth is manifested as the force acting on a free , unsupported body , causing it to
move in the general direction of the Earth's centre . The speed of the body is not ...
Excellent collections of articles on recent investigations of the solid Earth are P.J.
HART ( ed . ) , The Earth's Crust and Upper Mantle ( 1969 ) ; and E.C.
ROBERTSON ( ed . ) , The Nature of the Solid Earth ( 1971 ) . More technical
books on ...
From an experiment with a spherically shaped piece of lodestone , he concluded
that the entire Earth is a great magnet with ... In the sense of exact science ,
however , a full understanding of the distribution of the Earth's magnetic field was
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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