The Encyclopedia Americana, Volume 7Grolier, 1989 - Encyclopedias and dictionaries |
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Page 112
... become dark . Clouds Outside the Troposphere . Occasionally clouds are found very much higher above the earth's surface than clouds are usually found . Mother - of - pearl clouds occur in the stratosphere between about 13 and 19 miles ...
... become dark . Clouds Outside the Troposphere . Occasionally clouds are found very much higher above the earth's surface than clouds are usually found . Mother - of - pearl clouds occur in the stratosphere between about 13 and 19 miles ...
Page 262
... become al- most solid when stirring stops . This phenom- enon , called thixotropy , occurs in substances such as oil well drilling mud and nondrip paint . Other substances show the opposite effect and become solid when stirred rapidly ...
... become al- most solid when stirring stops . This phenom- enon , called thixotropy , occurs in substances such as oil well drilling mud and nondrip paint . Other substances show the opposite effect and become solid when stirred rapidly ...
Page 366
... becomes brighter and larger , and a tail may have begun to develop by the time the orbit of Mars is reached . When the ... become most spectacular , especially if they should move in such a way as to pass fairly close to the earth before ...
... becomes brighter and larger , and a tail may have begun to develop by the time the orbit of Mars is reached . When the ... become most spectacular , especially if they should move in such a way as to pass fairly close to the earth before ...
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