1. Nature, 149, 565 (1942).
2. Similar mistakes have been perpetuated in the older nomenclature. For example, the last of the rare earths should not be called lutetium (Lu), but cassiopelum (Cp); about the priority of Auer v. Welsbach's claim see F. A. Paneth, Ergeb. exak. Naturwiss., 2, 168 (1923).
3. Perrier, C., and Segrè, E., Rend. Lincei, 25, 723 (1937); J. Chem. Phys., 5, 712 (1937).
4. Seaborg, G. T., and Segrè, E., Phys. Rev., 55, 808 (1939); Segrè, E., Nature, 143, 460 (1939). See also Segrè, E., and Wu, C. S., Phys. Rev., 57, 552 (1940).
5. Pool, M. L., and Quill, L. L., Phys. Rev., 53, 437 (1938); Law, H. B., Pool, M. L., Kurbatov, J. D., and Quill, L. L., Phys. Rev., 59, 936 (1941); Kurbatov, J. D., MacDonald, D. C., Pool, M. L., and Quill, L. L., Phys. Rev., 61, 106 (1942).