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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Pyromorphite, being a lead chloride apatite, indicates a high chloride
environment during its formation as an alteration product of galena (lead sul- fide
). Whitlockite differs chemically from apatite because it contains more phosphorus
and is ...
It averages 1,000 metres (3,000 feet) in Plateau elevation and contains
numerous depressions or basins, some of which hold salt lakes. The central part
of Iran is also a high plateau containing a major basin of internal drainage.
Farther east ...
Closely linked with this region is that region around Krakow, which contains the
Nowa Huta steelworks, Poland's largest, based on Silesian coal and iron ore
imported from the Soviet Union. The Holy Cross mountain region is the home of
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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