298 



BELL SYSTEM TECHNICAL JOURNAL 



T. Lyman: The Spectroscopy of the Extreme Ultra-violet (Longmans, Green & Co., 

 1914). Astroph. Jl. 43, pp. 87-102; 1916. Nature 104, p. 314; 1922 (lines of 

 ionized helium;. Phil. .Mag. 41, pp. 814-817 (1921) and Science, 56, pp. 167- 

 168 (1922) (hues of neutral helium; with H. Fricke,) J. Opt. Soc. 7, pp. 495-499; 

 1923. (Vacuum grating spectrograph.) 



C. A. Mackay: Phys. Rev. 21, p. 717; 1923. 



J. C. McLennan: Proc. Roy. Soc. 95.4, pp. 258-273; 1919 (with R. J. Lang), ibid. 

 98-4, pp. 114-123; 1920. (Vacuum grating spectrograph), ibid. 102/1, pp. 

 389-410; 1923 (with M. L. Clark; excitation potentials). 



R. A. Millikan: Astroph. Jl. 52, pp. 47-64; 1920. ibid. 53, pp. 150-160; 1921 

 (with R. A. Sawyer, 1. Bowen). Phys. Rev. 23, 1-34; 1924 (with L Bowen). 

 Cf. also R. A. Sawyer. 



F. L. Mohlerand P. D. Footc: Bull. Bur. Standards 17, pp 471-496; 1923. 

 P. S. Olmstead and K. T. Compton: Phys. Rev. 22, pp. 559-565; 1923. 



O. VV. Richardson and C. B. Bazzoni : I'hil. Mag. 42, pp. 1015-1019; 1921. 



G. K. Rollefson: Phys. Rev. 23, pp. 35-45; 1924. 



F. A. Saunders: Astroph. Jl. 40, pp. 377-384; 1914. (Vacuum arc spectra.) Science 



59, pp. 50-51; 1924. (Ionizing potentials.) 

 R.A.Sawyer: .Xstroph. Jl. 52, pp. 286-300; 1920. 

 F. Simeon: Phil. Mag. 46, pp. 816-819; 1923. Proc. Roy. Soc, 102.4, pp. 484-496; 



1923. ibid. JO.',A, pp. 368-375; 1923. 

 A. von Welsbach: Ann. d. Physik 71, pp. 7-11; 1923. 



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