ULTRAVIOLKT SPECTROSCOPIC TECHNIQUE 159 



Kasha, M. (1948) Transmission filters for the ultraviolet. J. Opt. Soc. Amer., 38: 



929-934. 

 Kerr, G. P. (1947) New meters employing light-sensitive cells for the measurement 



of erythemal energy. Rev. Sci. Instr., 18: 472-473. 

 King, A. S. (1925) Spectroscopic phenomena of the high-current arc. Astrophys. 



J., 62: 238-249. 

 Kistiakowsky, G. B. (1931) A high power source of continuous ultraviolet spectrum. 



Rev. Sci. Instr., 2: 549-550. 

 Klasens, H. A., W. Ramsden, and C. Quantie (1948) The relation between efficiency 



and exciting intensity for zinc-sulphide phosphors. J. Opt. Soc. Amer., 38: 60-65. 

 Kohn, H., and K. v. Fragstein (1932) Ein Christiansenfilter fiir ultraviolette 



Strahlung. Physik. Z., 33: 929-931. 

 Koller, L. R. (1952) Ultraviolet radiation. John Wiley <fe Sons, Inc., New York, 



Chap. 1-4. 

 Koller, L. R., and A. H. Taylor (1935) Cadmium magnesium alloy photo-tubes. 



J. Opt. Soc. Amer., 25: 184. 

 Kremers, H. C. (1940) Synthetic optical crystals. Ind. E:ng. Chem., 32: 1478-1483. 

 Kroger, F. A. (1948) Some aspects of the luminescence of solids. Elsevier Publish- 

 ing Company, Inc., New York. 

 Kuper, J. B. H., F. S. Brackett, and M. Eicher (1941) An integrating photoelectric 



meter. Rev. Sci. Instr., 12: 87-90. 

 Kurtz, H. F. (1926) A new quartz ultraviolet monochromator. J. Opt. Soc. Amer., 



13: 495-501. 

 Ladenburg, R., C. C. Van Voorhis, and J. C. Boyce (1932) Absorption of oxygen in 



the region of short wavelengths. Phys. Rev., 40: 1018-1020. 

 Lange, B. (1938) Photoelements and their application. Reinhold Publishing 



Corporation, New York. 

 Lash, J. F. (1949) Feedback improves response of D-C amplifier. Electronics, 22, 



Feb.: 109-111. 

 Launer, H. F. (1940) An easily constructed, rugged, sensitive thermopile. Rev. 



Sci. Instr., 11: 98-101. 

 (1949) Exposure meter for precision light dosage. Rev. Sci. Instr., 20: 



103-109. 

 Leighton, W. G., and G. S. Forbes (1930) Precision actinometry with uranyl 



oxalate. J. Am. Chem. Soc, 52: 3139-3152. 

 Leverenz, H. W., and F. Seitz (1939) Luminescent materials. J. Appl. Phys., 10: 



479-493. 

 Ley, H., and H. Wingchen (1934) Gegenseitige Beeinflussung chromophorer Grup- 



pen. Ber. deut. chem. Ges., 67: 501-519. 

 Lifschitz, J. (1919) Photochemische L^mlagerungen in der Triphenyl-Methanreihe. 



Ber. deut. chem. Ges., 52: 1919-1926. 

 Lifschitz, J., and C. L. Joffe (1921) Uber photochemische Umlagerungen in der 



Triphenylmethanreihe und Photo-Conzentrationsketten. Z. physik. Chem., 97: 



426-444. 

 Liston, M. D., C. E. Quinn, W. E. Sargeant, and G. G. Scott (1946) A contact 



modulated amplifier to replace sensitive suspension galvanometers. Rev. Sci. 



Instr., 17: 194-198. 

 Loofbourow, J. R. (1950) Microspectroscopy. J. Opt. Soc. Amer., 40: 317-325. 

 Luckiesh, M., and A. H. Taylor (1940) An ultraviolet meter for germicidal lamps. 



Rev. Sci. Instr., 11: 110. 

 Lui, C. K. (1945) Absorption and excitation of zinc silicate phosphors. J. Opt. 



Soc, Amer., 35: 492-494, 



