The Arctic Home in the Vedas c2.12

c2.12

Geological climate — Uniform and gentle in early ages — Due to different distribution of land and water — Climatic changes in the Quarternary era — The Glacial epoch — Its existence undoubtedly proved — Extent of glaciation — At least two Glacial periods — Accompanied by elevation and depression of land — Mild and genial inter-glacial climate even in the Arctic regions — Various theories regarding the cause of the Ice Age stated — Lyell's theory of geographical changes — Showing long duration of the Glacial period — Croll's theory — Effect of the precession of the equinoxes on the duration and intensity of seasons — The cycle of 21,000 years — The effect enhanced by the eccentricity of the earth's orbit — Maximum difference of 33 days between the duration of summer and winter — Sir Robert Ball's calculations regarding the average heat received by each hemisphere in summer and winter — Short and warm summers and long and cold winters, giving rise to a Glacial epoch — Dr. Croll's extraordinary estimate regarding the duration of the Glacial epoch — Based on the maximum value of the eccentricity of the earth's orbit — Questioned by astronomers and geologists — Sir Robert Ball's and Newcomb's view — Croll's estimates inconsistent with geological evidence — Opinions of Prof. Geikie and Mr. Hudleston — Lon duration of the Glacial period — Summary of results. 20