[115] Phys. Zeitschr., XVI (1915), 10.

[116] Ann. d. Phys., XLVI (1915), 261.

[117] Phys. Zeitschr., XII (1911), 162.

[118] Ibid., XVI (1915), 316.

[119] Phys. Rev., II (1913), 138.

[120] See Phys. Rev., II (1913), 134-35.

[121] Phys. Rev., XXXII (1911), 389.

[122] See Schidlof et Karpowicz, Comptes rendus, CLVIII (1914), 1912.

[123] E. Schmid, Wien. Akad. Ber., CXXIX (1920), 813, and ZfP, V (1921), 27.

[124] R. Bär, in a series of articles recently summarized in Die Naturwissenschaften, Vols. XIV and XV, 1922, has emphasized this point. His data serve merely as a new check upon the work found in our preceding tables.