1. F. Sacco, articleSelenologie inHandwörterbuch der Naturwissenschaften, vol. 9, p. 7. Jena 1913.
2. G. Dahmer, ‘Die Gebilde der Mondoberfläche’,Neues Jahrb. Min., Geol. u. Palänt, 1911,I. pp. 89–113. Also see same journal 1912,II pp. 42-44.
3. Translator's note: In the original text Wegener uses the wordMassenkraft which I translated as ‘mass force’. I believe, however, this is identical with ‘gravitational force’.
4. Among 1095 altitude measurements Mädler found six peaks between 6000 and 7000 meters, 21 between 5000 and 6000 m; 82 between 4000 and 5000 m. above the surrounding terrain.
5. It is interesting to note that these ideas, among many absurdities, were clearly stated by Gruithuisen in hisAnalekten für Erd- und Himmelskunde (vol. 2, p. 48, Munich 1928). “Here we deal with totally rigid masses. The effects of gravity overcome their strength more easily as the masses become larger. The large masses would like to sink into the Moon, so its total rigidity (Kohärenz) would be like that of other heavenly bodies. Figuratively speaking, the heavenly bodies behave more like dough or soft lime as they become larger. So, even if the Moon were always as rigid as it is today it would still have a spheric shape.”