[60] W. H. Hobbs, Characteristics of Existing Glaciers, 1911, p. 22.

[61] Op. cit., p. 286. Reference on p. 190.

[62] Corrosion of Gravity Streams with Application of the Ice Flood Hypothesis, Journ. and Proc. of the Royal Society of N. S. Wales, Vol. 43, 1909, p. 286.

[63] G. K. Gilbert, Systematic Asymmetry of Crest Lines in the High Sierra of California. Jour. Geol., Vol. 12, 1904, p. 582.

[64] Op. cit., p. 300; reference on p. 582.

[65] Op. cit., p. 300; see pp. 579-588 and Fig. 8.

[66] The observation at Camaná checks very closely with a Peruvian observation the value of which is S. 16° 37′ 00″.