[79] Wiener Berichte, CXVI (1907), II, 1175. [80] Comptes rendus, CXLVI (1908), 624, 1010. [81] Ibid., CXLIV (1907), 1338. [82] Ibid., CXLVIII (1909), 1316. [83] Jahrbuch der Radioaktivität und Elektronik, X (1913), 513. [84] Science, February 17, 1911. [85] Phys. Zeitschr., XII (1911), 202-8; see also Phys. Rev., XXXIII (1911), 81. [86] Phys. Rev., I, N.S. (1913), 218. [87] It was read before the Academy on July 6: Wiener Berichte, CXX (1911), II, 1021, but appeared first in print in the August 1st number of the Phys. Zeitschr. (1911), p. 63. Fletcher’s article is found in brief in an earlier number of the same volume of the Phys. Zeitschr. p. 203, and was printed in full in the July number of Le Radium, VIII (1911), 279. [88] No error is introduced here if, as assumed, is small in comparison with . However for more rigorous equations see Fletcher, Phys. Rev., IV (1914), 442; also Smoluchowski, Phys. Zeitschr., XVI (1915), 321. [89] Le Radium, VIII (1911), 279; Phys. Rev., XXXIII (1911), 107. [90] Phys. Rev., I (1913), 218. [91] Sitzungsber. d. k. Akad. d. Wiss. in Wien, CXX (1911), II, 1021. [92] Ibid., CXXI (1912), II, 950. [93] Ztschr. f. Phys. Chem., LXXXVII (1914), 40. [94] Die Brownsche Bewegung besonders als Mittel zur Bestimmung der Avogadroschen Konstante, inaugural dissertation. Upsala: Almquist & Wiksells Boktryckeri, 1915. [95] Proc. Roy. Soc., A LXXXI (1908), 141, 161. [96] Sitzungsber. d. k. Preuss. Akad., XXXVIII (1909), 948. [97] Rutherford and Royds, Phil. Mag., XVII (1909), 281. [98] Phil. Mag. (6), XXII (1911), 599. [99] Phil. Mag. (6), V (1903), 429. [100] Comptes rendus, CXLVI (1908), 624, 1010. [101] Ibid., CXLIV (1907), 1338. [102] Ibid., CXLVIII (1909), 1316. [103] Phys. Zeilschr., X (1909), 308. [104] Ibid., XI (1910), 619. [105] This paper was published in abstract in Phys. Rev., XXX (1909), 360, and Phil. Mag., XIX (1910), 209. [106] This paper was published in abstract in Phys. Rev., XXXI (1910), 92; Science, XXXII (1910), 436; Phys. Zeitschr., XI (1910), 1097. [107] Wien. Ber., CXIX (1910), II, 809. This publication was apparently not issued before December, 1910, for it is not noted in Naturae Novitates before this date. [108] Proc. Roy. Soc., LXXXIII (1910), 360. [109] These results were presented and discussed at great length in the fall of 1910; see Phys. Zeitschr., XI (1910), 619, 940. [110] Phys. Zeitschr., XII (1911), 161; Phys. Rev., XXXII (1911), 394. [111] Le Radium, VIII (1911), 279; Phys. Rev., XXXIII (1911), 107. [112] Phys. Rev., XXXIII (1911), 366, 367. [113] See R. Pohl, Jahrbuch der Radioaktivität und Elektronik, VII (1912), 431. [114] Wien. Sitzungsber., CXXIII (1914), 53-155; Ann. d. Phys., XLIV (1914), 657.