ii6 The American Geologist. February, i904. 
ferred to a hypothesis of earth-genesis which was not good 
theory, nor even a scientific induction, and which has been a 
hindrance and a burden on the progress of earth-science. 
The geology of the future will be made by geologists and 
not by the philosophers ; and the study of planetary conditions 
will have one foundation in geology, as it is here that the 
science of worlds has an observational basis. Jhe new geology 
is, even today, modifying the old astronomy. The student in 
cosmic science must have his feet on the earth even if his head 
is among the stars. 
EDITORIAL COMMENT. 
THE EVOLUTION OF CLIMATES. '•• 
This paper, in its enlarged form, and now published by the 
author, contains essentially the facts and deductions that ap- 
peared in this magazine four years ago (August to October, 
1899), under the same title, and in his previous paper (The 
Laws of Climatic Evolution, American Geologist^ Vol. 23, 
PP- 44-57, Jan- 1899) -t 
Synoptically stated, the author's hypothesis involves the 
following fundamental ideas : 
I. The original primary heat of the earth was sufficient 
and was so conserved as to determine the climates of the earth 
and make them uniform from pole to pole during the geological 
ages until the Glacial epoch. 
*"The Evolution of Climates" by Mardskn M\nson, revised, enlarged 
and reprinted from the American Geologist, pp. 86, with 9 plates, Augtist, 
1903. 
f Earlier papers by the same author, presenting his first discussions of this 
subject are the following: Physical and Geological traces ol permanent 
Cyclone belts. Transactions of the Technical Society of the Pacific Coast, vol. 
viii, No. 1; The cause of the Glacial Period, and an explanation of geological 
climates. Ditto, vol. viii, pp. 3-21. Read Sept. 14, 1891; Geological and Solar 
Climates; their causes and variations. A Thesis, Geo\ogy and Physics. Univer- 
sity of California, May, 1893; Circulation of the atmosphere of Planets. 
Trans. Tech. Soc. Pacific Coast, vol. ix, No. 5, Jan., 1892; Cosmic character of 
the Ice Age, Glacialists' Magazine, vol, ii, Nos. 5 and 6; The cause of the Ice 
Age and Geological climates. Trans. Geol. Soc. Australasia, vol. i, part 6. 
Preliminary paper to the Seventh International Congress of Geologists: in 
French. Read by title, 1897; The laws of climatic evolution. British Associa- 
tion for the Advancement of Science. (By request of Prof. Juddi. 1898. This 
subject was discussed mathenitically by T. Hopkins, ./^our. Geol. Soc . vol. viii; 
also Phil Trans., 1857, p. 805. This was one of the early calculations of the 
effects of secular heat on the climates of the earth. In 1864 Prof. E. Frank- 
land, F. R. S.. advocated earth-heat as a climatic factor. Phil. Mag., May, 
1864; also S\RTnRius von Waltkrhaussen. During the latter part of the 
eighteenth and the f arly part of the nineteenth centuries Hutton and Werner 
held similar views, but these have been abandoned as untenable. (See Glaciers, 
Shalkr and Davis, p. 70, and Climatic changes of later Geologic Times, 
Whitney, p. 261). 
