EFFECTS OF A CRYSTALLOGRAPHIC TRANSFORMATION ON THE PHOTOELECTRIC AND THERMIONIC EMISSION FROM COBALT.

1 J. H. Van Vleck, Phys. Rev., 31, 587 (1928), especially pp. 599-601. 2 S. C. Wang, Ibid., 31, 579 (1928). 8 The explicit formulas connecting Wang's coordinates with polar coordinates are q2 = r2 + (D2/4) rD cos 0, p2 = P# + (D2/4) + rD cos 0. 4 If we integrate first over q, the limits of integration for q are from IpDI to p + D, and those for p are from 0 to c. The case of integrating first over p is similar except that q, p are interchanged. It is convenient to integrate first over q for terms at the outset involving p in the denominator, and first over p for those involving q in the denominator. In this way one avoids encountering the integral fdxex/x. 5 See especially Eq. (15) of ref. 1, taking M = (-e/2mc) P 6 W. Pauli, Jr., Zeits. Physik, 2, 201 (1920). 7 S. C. Wang, Proc. Nat. Acad. Sci., 13, 798 (1927). 8 J. H. Van Vleck, Ibid., 12, 662 (1926). 9 R. T. Birge, Ibid., 14, 12 (1928); E. U. Condon and H. D. Smythe, Ibid., 14, 871 (1928). 10 J. G. Winans and E. Stueckelberg, Ibid., 14, 867 (1926). I1 A. Unsold, Ann. der Physik, 82, 380 (1927). 12 J. H. Van Vleck, Phys. Rev., 29, 727 (1927), especially Eq. 17. 13 Wills and Hector, Ibid., 23, 209 (1924); Hector, Ibid., 24, 418 (1924); T. Sone, Phil. Mag., 39, 305 (1920); E. Lehrer, Ann. der Physik, 81, 229 (1926).