[341]. Rutherford and Soddy, Phil. Mag. April, 1903.

[342]. Rutherford and Soddy, Phil. Mag. May, 1903.

[343]. Rutherford, Phys. Zeit. 4, p. 235, 1902. Phil. Mag. Feb. 1903.

[344]. Rutherford, Phil. Mag. May, 1903.

[345]. Curie and Laborde, C. R. 136, p. 673, 1903.

[346]. J. J. Thomson, Nature, p. 601, 1903.

[347]. Crookes, C. R. 128, p. 176, 1899.

[348]. F. Re, C. R. p. 136, p. 1393, 1903.

[349]. Richarz and Schenck, Berl. Ber. p. 1102, 1903. Schenck, Berl. Ber. p. 37, 1904.

[350]. Armstrong and Lowry, Proc. Roy. Soc. 1903. Chem. News, 88, p. 89, 1903.