The Encyclopedia Americana, Volume 7Grolier, 1985 - Encyclopedias and dictionaries |
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Page 80
Even though glaciers never covered more than a small fraction of the earth's surface , they had a worldwide effect on the climates . In gen- eral , the ice ages caused lower temperatures around the world , and they produced more pre- ...
Even though glaciers never covered more than a small fraction of the earth's surface , they had a worldwide effect on the climates . In gen- eral , the ice ages caused lower temperatures around the world , and they produced more pre- ...
Page 160
loids as well as tannins and a volatile oil contrib- ute to the overall effects of coca leaf chewing . In the United States , all use of coca and its prep- arations and derivatives is under regulation of the federal narcotic laws .
loids as well as tannins and a volatile oil contrib- ute to the overall effects of coca leaf chewing . In the United States , all use of coca and its prep- arations and derivatives is under regulation of the federal narcotic laws .
Page 315
This is an area concerned with the effect of adjacent areas of color upon each other , either in space ( simultaneous con- trast ) or time ( successive color contrast ) . Usu- ally the color differences between objects are accentuated ...
This is an area concerned with the effect of adjacent areas of color upon each other , either in space ( simultaneous con- trast ) or time ( successive color contrast ) . Usu- ally the color differences between objects are accentuated ...
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