41
Hardy and Anderson, Proc. Roy. Soc. 72, p. 393, 1903.
CHAPTER VI. CONTINUOUS PRODUCTION OF RADIO-ACTIVE MATTER.
1
Crookes, Proc. Roy. Soc. 66, p. 409, 1900.
2
Becquerel, C. R. 131, p. 137, 1900; 133, p. 977, 1901.
3
Rutherford and Soddy, Phil. Mag. Sept. and Nov. 1902. Trans. Chem. Soc. 81, pp. 321 and 837, 1902.
4
Rutherford and Soddy, Phil. Mag. Sept. 1902.