[40] See Meteorologische Zeitschrift, Vol. 5, p. 195, 1888. Also cited by J. Hann in Handbuch der Climatologie, Vol. 2, Stuttgart, 1897; W. Sievers, Süd und Mittelamerika, Leipzig and Vienna, 1914, p. 334.
[41] The Physiography of the Central Andes, Am. Journ. Sci., Vol. 40, 1909, pp. 197-217 and 373-402.
[42] Results of an Expedition to the Central Andes, Bull. Am. Geog. Soc., Vol. 46, 1914. Figs. 28 and 29.
[43] The Physiography of the Central Andes, by Isaiah Bowman; Am. Journ. Sci., Vol. 28, 1909, pp. 197-217 and 373-402. See especially, ibid., Fig. 11, p. 216.
[44] Travels Amongst the Great Andes of the Equator, 1892.
[45] Geografía y Geología del Ecuador, 1892.
[46] Das Hochgebirge der Republik Ecuador, Vol. 2, 2 Ost-Cordillera, 1902, p. 162.
[47] Contributions to the Geology of British East Africa; Pt. 1, The Glacial Geology of Mount Kenia, Quart. Journ. Geol. Soc., Vol. 50, 1894, p. 523.
[48] See especially A. Penck (Penck and Brückner), Die Alpen im Eiszeitalter, 1909, Vol. 1, p. 6, and I. C. Russell, Glaciers of Mount Rainier, 18th Ann. Rep’t, U. S. Geol. Surv., 1890-97, Sect. 2, pp. 384-385.
[49] Die Sierra Nevada de Santa Marta und die Sierra de Perijá, Zeitschrift der Gesellschaft für Erdkunde zu Berlin, Vol. 23, 1888, pp. 1-158.