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2015 | OriginalPaper | Buchkapitel

17. Astronomical Theory Continued

verfasst von : Harold W. Borns Jr., Kirk Allen Maasch

Erschienen in: Foot Steps of the Ancient Great Glacier of North America

Verlag: Springer International Publishing

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Abstract

Much of the heat of the sun due to his diurnal motion—The earth generates heat from a similar action—Von Mayer’s theory again—Objections to it—Only one great cold period for each polar temperature of the earth—New England had no cool climate till the Tertiary age—The approach of ancient glaciers towards the equator, not an isothermal line of the present arrangement of land and water—The cold period of the northern hemisphere not synchronous with that of the southern one—No astronomical theory which supposes the loss of solar heat available—Variation of the magnetic poles insufficient to account for the cold period—Their duality and locality—Cold winters in Europe 2000 years ago—Iceland and Greenland warmer then than now—Traditions of the Eskimos—Depression of the northern part of the hemisphere would make the temperate zone milder than at present—The glacial ice cap must have commenced at the geographic pole.—The precession of the equinoxes insufficient to account for the cold period— Views of some astronomers upon the changeability of climates in Europe.

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Fußnoten
1
“Atlantic Monthly” for February 1869, p 21, “Birth of the Solar System.”
 
2
“Atlantic Monthly” for Nov. 1863, p 569.
 
3
Col. Charles Whittlesey contributed to the American Association for the Advancement of Science in 1867, a paper on “Depression of the Sea during the Glacial Period”. He estimates that one fifth of the surface of the earth was covered with ice, which includes both polar hemispheres in an ice cap. Assuming that this ice sheet was 2000 ft thick, it would equal a mass of water 1800 ft thick,as water is one tenth denser than ice and would depress the ocean 360 ft. But the mean thickness of the glacial mass of the northern hemisphere must have been at least 4000 ft and if but one hemisphere at a time, was loaded with ice, the lowering of the ocean would extend the area of dry land south or north as the case might be, so that the balance of vital forces might not have been disturbed by the alternate loading of the poles with ice. Vide American Naturalist for Dec. 1867, p. 55.
 
4
“Arctic Explorations”, vol. II, p. 427.
 
5
Profs. Rafn and Magnusson Runic Scholars of the Royal Society of Antiquaries of Copenhagen have made out a part of the inscripture on the Dighton Rock to be “on this spot landed Thorfin with one hundred and thirty-one men”.
 
6
Somerville’s Physical Geography, p. 275.
 
7
“Arctic Explorations”, vol. II, p 160.
 
Metadaten
Titel
Astronomical Theory Continued
verfasst von
Harold W. Borns Jr.
Kirk Allen Maasch
Copyright-Jahr
2015
DOI
https://doi.org/10.1007/978-3-319-13200-6_17