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Published online by Cambridge University Press: 01 May 2009
page 280 note 1 Reprinted from Science, n.s., vol. xxxi, No. 789, pp. 218–20, 02 11, 1910.Google Scholar
page 280 note 2 January 7, 1910.
page 280 note 3 Vol. xiv, p. 798.
page 280 note 4 Vol. xiii, p. 276.
page 280 note 5 Technology Qunrttrly, 1906, vol. xix, p. 410.Google Scholar
page 281 note 1 Vol. xxiv, p. 116.
page 281 note 2 “Landslides of the San Juan Mountains”: U.S.G.S. Professional Paper, No.67.