The New Encyclopaedia Britannica
Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries - 934 pages
 Propaedia: outline of knowledge and guide to the Britannica.--- Micropaedia: ready reference and index.--- Macropaedia: knowledge in depth.
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The spectra of the planets are quite similar to the solar spectrum because they
shine by reflected light from the Sun. Most contain additional absorption lines and
molecular bands, however, because of gases in the planetary atmospheres.
Guidance of planetary space probes demands much higher accuracy, which is
provided by radar measurements. Pulses from a powerful transmitter are beamed
to a planet, reflected waves are collected by a large radio “dish,” and the time ...
Dependence on the environment and on its resources was reflected in
seminomadic living. The Aborigines had to be intimately acquainted with all the
country within their range of movement. At the same time, their economic system
was not ...
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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