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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That this period is a biologically significant one for the human species is further
suggested by the fact that the average ... Annual rhythms include also hibernation
to bridge the coldest period of the year and estivation to avoid hot-summer ...
'Lanthanum and the lanthanons Figure 1: Short-period form ot periodic system of
elements. ... In this table, Figure 2, there are periods of increasing length between
the noble gases; the table thus contains a period of 2 elements, two periods of ...
The periods are of varying lengths. First there is the hydrogen period, consisting
of the two elements hydrogen, 1, and helium, 2. Then there are two periods of
eight elements each: the first short period, from lithium, 3, to neon, 10; and the ...
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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