^{page 418 note 1} Lamplugh, G. W., 1914. “The Interglacial Problem in the British Islands”: C.R. Congr. Geol. Internat. Canada, 1913, pp. 427–34.Google Scholar

^{page 418 note 2} London, 1894, pp. 608–12. Cf. Journ. Geol. Chicago, vol. 3, pp. 246–52.Google Scholar

^{page 418 note 3} Moberg, J. C. & Holst, N. O., 1899. De sydskånska rullstensåsarnes vittnesbörd i frägan om istidens kontinuitet. Lund.Google Scholar

^{page 419 note 1} Holst, N. O., 1911. “Alnarpsfloden, en Svensk ‘Cromerflod’”: Sveriges geol. Undersök., ser. C, No. 237.Google Scholar

^{page 419 note 2} De Geer, Gerard, 1884. “Om den skandinaviska landisens andra utbredning”: Geol. Fören. Stockholm Förh., Bd. 7, p. 436. Also, 1885, Zeitschr. Deutsch. Geol. Ges., Bd. 37, p. 177.CrossRefGoogle Scholar

^{page 419 note 3} 02. 4, 1904. Geol. Fören. Stockholm Förh., Bd. 26, p. 92.Google Scholar

^{page 419 note 4} Ussing, N. V., 1903–4. “Om Jyllands Hedesletter og Teorierne for deres Dannelse”: Oversigt Danske Videnskab. Selsk. Förh., 1903, pp. 99–152. Résumé en français, pp. 153–65.Google Scholar

^{page 419 note 5} Wolff, W., 1914. “Ueber Glazial und Interglazial in Norddeutschland”: C.R. Congr. Geol. Internat. Canada, 1913, pp. 467–77.Google Scholar

^{page 420 note 1} Wahnschaffe, F., 1893. “Ergebnisse einer Tiefbohrung in Niederschōnweide bei Berlin”: Zeitschr. Deutsch. Geol. Ges., Bd. 45, pp. 292–3.Google Scholar

^{page 420 note 2} Wahnschaffe, F., 1901. Die Ursachen der Oberflächengestaltung des norddeutschen Flachlandes, 2 Aufl., p. 239, Stuttgart.Google Scholar

^{page 421 note 1} Ussing, op. cit., 1903, see map.

^{page 421 note 2} Holst, N. O., 1913. “Le commencement et la fin de la période glaciaire”: L’Anthropologie, tome 24, p. 377.Google Scholar

^{page 421 note 3} 1912. C.R. Congr. Geol. Internat. Stockholm, 1910, p. 1076.Google Scholar

To correlate the phenomena of the Ice Age within this little Alpine district with those in the great glacial district of Northern Europe constitutes undoubtedly no easy problem, and we cannot blame Penck if he delays to express himself upon it. “The master is still in his workshop, and has not yet finished his work.” No one can wish to urge him on with indecent haste, but it would certainly be most illuminating if he would let us see what he already has finished. For one thing it might put a check upon his pupils, so that they should not in their enthusiasm press too far, and further than he himself wishes.

^{page 422 note 1} Boyd Dawkins, W., 1903. “On the discovery of an Ossiferous Cavern of Pliocene Age at Doveholes, Buxton (Derbyshire)”: Quart. Journ. Geol. Soc., vol. 59, pp. 105–32. See p. 122.CrossRefGoogle Scholar

^{page 422 note 2} von Zittel, K. A., 1895. Grundzüge der Palaeontologie. See pp. 946, 947, 944.Google Scholar

^{page 423 note 1} Holst, op. cit., 1911, pp. 30–1, 61–2.Google Scholar

^{page 423 note 2} Boyd Dawkins, W., op. cit., 1903, pp. 129 and 125.Google Scholar

^{page 423 note 3} Sixteenth and concluding Report of the Committee appointed for the purpose of exploring Kent's Cavern, 1881. Rep. Brit. Assoc. for 1880, p. 68.Google Scholar

^{page 423 note 4} Prestwich, J., 1874. “Report on the Exploration of Brixham Cave”: Phil. Trans., vol. 163, p. 471.Google Scholar

^{page 424 note 1} Holst, N. O., 1909. “Postglaciala tidsbestämningar”: Sveriges Geol. Undersök., ser. C, No. 216.Google Scholar

^{page 424 note 2} de Morgan, J., Capitan, & P. Boudy, 04, 1910. “Étude sur les stations préhistoriques du Sud Tunisien”: Rev. Ecole Anthrop. Paris, tome 20.Google Scholar

^{page 424 note 3} Hume, W. F., 1910. “Climatic Changes in Egypt during Post-Glacial Times”: pp. 421–4 of Die Veränderungen des Klimas. Sep. publ. Congr. Geol. Internat., Stockholm.Google Scholar