Note 7 — INTRODUCTORY.
Reading edition
Joseph Prestwich, Geology, Vol. II, p. 465, (Oxford, 1888). J. D. Dana, Text Book of Geology, pp. 355-359 (New York, 1883). Geo. M. Dawson, in The American Geologist, 1890, p. 153. The last mentioned gives an excellent epitome of the history of the great Pacific glacier.