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 great advantage of biological control methods — their specificity — is also a
source of weakness. Usually several species of pests attack a given host plant. If
biological methods can deal satisfactorily with perhaps three out of five pest ...
New engineering methods led to an economically optimum recovery from each
reservoir. These methods often were based on the injection of some less
expensive fluid, such as water, to force additional petroleum into the producing
Dry extracts are prepared by the methods described above for fluid extracts,
followed by evaporation, usually under reduced pressure, either to a pilular
consistency or to dry- ness. Dry extracts are usually granulated by being passed
through a ...
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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