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 most important Permian economic deposits are rock salt and potash salts,
coal, oil, and gas. Economically important evaporites (salts formed by chemical
precipitation under generally arid conditions) of Permian age are found in the ...
The most important terpene, as the isoprene polymers are called, is rubber that
exists in the sap of many tropical trees, especially of the genus Hevea. Rubber is
a polyhy- drocarbon and consists, in the native state, of long chains of isoprene, ...
Intermolecular forces. Another important factor for the development of
characteristic mechanical properties is the magnitude of the intermolecular forces
between individual macromolecules in a given material, as well as the structural
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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