Spectrum of Radium.—Demarcay: Compt. rend., Dec., 1898, Nov. 1899, July, 1900; Giesel: Phys. Ztschr., Sept. 15, 1902; Runge and Precht: Ibid., 4, 285 (1903).
Radiation of Radium.—M. and Mme. Curie: Compt. rend., Nov., 1899, Jan. 8, 1900, pp. 73 and 76, March 5, 1900 (electric charge of the rays), Feb. 17, 1902 (conductivity of liquids under the influence of the rays); Becquerel: Ibid., Dec. 4, 11, and 26, 1899, Jan. 29, Feb. 12, April 9 and 30, 1900; Giesel: Wied. Ann., 69, 91, 834; S. Meyer and V. Schweidler: Acad. de Vienne, Nov. 3 and 9, Dec. 7, 1899; Kaufmann: Nachrichten der K. Ges. Wiss. Göttingen, 1901, Heft 2; Rutherford: Phil. Mag., 4, 1 (1902).
α-Rays of Radium.—Rutherford: Phil. Mag., Feb. 1903; Becquerel: Compt. rend., Jan. 26, Feb. 16, June, 1903; Des Coudres: Phys. Ztschr., June 1, 1903; Crookes: (spinthariscope) Chem. News, April 3, 1903.
Heat Given Off by Radium.—P. Curie and Laborde: Compt. rend., March 16, 1903; P. Curie: Roy. Inst. June 19, 1903.
Actinium.—Debierne: Compt. rend., Oct. 16, 1899, April 2, July 30, 1900; Feb. 16 and March 16, 1903.
Radioactive Lead.—Giesel: Ber. d. chem. Ges., 34, 3779 (1901); Hofmann and Strauss: Ibid., 33, 3126 (1900).
Radioactivity of all Substances.—Strutt: Phil. Trans., 1901; Phil. Mag., June, 1903; MacLennan and Burton: Ibid., June, 1903; Lester Cooke: Ibid., October, 1903.
Induced Radioactivity and the Emanation of Radium.—P. Curie and M. Curie: Compt. rend., Nov. 6, 1899; P. Curie and Debierne: Ibid., 1901 (5 notes); P. Curie: Ibid., Nov. 17, 1902, Jan. 26, 1903; P. Curie and J. Danne: Ibid., Feb. 9 and June 2, 1903: Dorn: Abhand. Naturforsch. Ges. Halle, June, 1900: Rutherford: Phys. Ztschr., April 20, 1901, Feb. 15, 1902; Rutherford and Miss Brooks: Chem. News, April 25, 1902; Rutherford and Soddy: J. Chem. Soc. (London), April, 1902; Rutherford: Phys. Ztschr., March 15, 1902, Phil. Mag., Nov., 1902, Jan., 1903; Rutherford and Soddy: (condensation of the emanations) J. Chem. Soc. (London), Nov. 19, 1902. Phil. Mag., May, 1903.
Induced Radioactivity and the Emanation of Thorium.—Rutherford: Phil. Mag., Jan. and Feb., 1900; Phys. Ztschr., April 20, 1901; Rutherford and Soddy: J. Chem. Soc. (London), April, 1902; Phil. Mag., 1902, pp. 370, 569; Rutherford: Phys. Ztschr., Feb. 15, March 15, 1902, Phil. Mag., Nov., 1902, Jan., 1903.
Radioactivity and Ionization of the Atmosphere and of Spring Water.—Elster and Geitel: Phys. Ztschr., 1900, 1901; Wilson: Proc. Roy. Soc. (London), 1901; Rutherford and Allen: Phil. Mag., Dec. 24, 1902; Elster and Geitel: Phys. Ztschr., Sept. 15, 1902; MacLennan: Phil. Mag., 5, 419; MacLennan and Burton: Ibid., June, 1903; Saake: Phys. Ztschr., 1903; Lester Cooke: Phil. Mag., Oct., 1903; J. J. Thomson: Conduction of Electricity through Gases, Cambridge, 1903.