Climatic Changes: Their Nature and Causes

by Ellsworth Huntington; Stephen Sargent Visher

[107] Personal communication.

[108] R. T. Chamberlin: Gases in Rocks, Carnegie Inst. of Wash., No. 106, 1908.

[109] J. Barrell: The Origin of the Earth, in Evolution of the Earth and Its Inhabitants, 1918, p. 44, and more fully in an unpublished manuscript.

[110] F. W. Clarke: Data of Geochemistry, Fourth Ed., 1920, Bull. No. 695, U. S. Geol. Survey, p. 256.

[111] F. W. Clarke: loc. cit., pp. 27-34 et al.

[112] Chas. E. St. John: Science Service Press Reports from the Mt. Wilson Observatory, May, 1922.

[113] Abbot and Fowle: Annals Astrophysical Observatory; Smiths. Inst., Vol. II, 1908, p. 163.

F. E. Fowle: Atmospheric Scattering of Light; Misc. Coll. Smiths. Inst., Vol. 69, 1918.

[114] Abbot and Fowle: loc. cit., p. 172.

[115] H. H. Turner: On a Long Period in Chinese Earthquake Records; Mon. Not. Royal Astron. Soc., Vol. 79, 1919, pp. 531-539; Vol. 80, 1920, pp. 617-619; Long Period Terms in the Growth of Trees; idem, pp. 793-808.