ultravioli:t spectroscopic technique 161 



Ifuiul, A. H. (1930) Bismuth black and its applications. Rev. Sci. Instr., 1 : 397-399. 



(1933) The optical properties of metallic and crystalline powders. J. Opt. 



Soc. Anier., 23: 375-378. 



(1937a) Radiation thermopiles. Rev. Sci. Instr., S: 417-419. 



(1937b) The blackening of radiometers. In, Measurement of radiant 



energy, ed. W. E. Forsythe. McGraw-Hill Book Company, Inc., New York. 

 Pp. 210-214. 



Piore, E. R., R. H. Kingston, E. M. Gyorgy, and G. G. Harvey (1951) The soft 

 X-ray spectroscopy of solids. Rev. Sci. Instr., 22: 543. 



Plymale, W. S., Jr., and D. F. Hansen (1950) Stabilized circuit for photomultipliers. 

 Electronics, 23 Feb.: 102-103. 



Polaroid Corporation (1951) Ultraviolet absorbing filters, non-polarizing. Cam- 

 bridge, Mass. 



Polster, H. D. (1949) Reflection from a multilayer filter. J. Opt. Soc. Amer., 39: 

 1038-1043. 



(1952) A symmetrical all-dielectric interference filter. J. Opt. Soc. Amer., 



42: 21-24. 



Powell, W. M., Jr. (1934a) Photoelectric measurements of the transmission of 

 fluorite in the Schumann region. Phys. Rev., 45: 154-157. 



(1934b) Photoelectric measurements of the absorption of fused and crystal- 

 line quartz between 1633 and 1463A. Phys. Rev., 46: 43-46. 



Pringsheim, P. (1949) Fluorescence and phosphorescence. Interscience Publishers, 

 Xew York. 



Rajchman, J. A., and R. L. Snyder (1940) An electrically-focussed multiplier photo- 

 tube. Electronics, 13 Dec: 20-23, 58, 60. 



Raman, C. V. (1949) The theory of the Christiansen experiment. Indian Acad. 

 Sci. Proc, 29A: 381-390. 



Ramasastry, C. (1947) A source of continuous spectrum in the ultra-violet. Indian 

 J. Phys., 21: 272-274. 



Regener, V. H. (1936) Ein ultraviolett Filter mit einstellbarer Durchlassigkeits- 

 grenze. Quart. J. Roy. Meteorol. Soc, 62, SuppL: 9-11. 



Rentschler, H. C. (1930) An ultraviolet light meter. Trans. Am. Inst. Elec. Engrs., 

 49: 576-578. 



Rentschler, H. C, D. E. Henry, and K. O. Smith (1932) Photoelectric emission from 

 different metals. Rev. Sci. Instr. 3: 794-802. 



Rittner, E. S. (1947) Improvement of the characteristics of photo-voltaic and photo- 

 conductive cells by feedback circuits. Rev. Sci. Instr., 18: 36-38. 



Saunders, F. (1928) An ultraviolet light filter. J. Opt. Soc. Amer., 16: 362. 



Savitzky, A., and R. S. Halford (1950) A ratio-recording double beam infrared 

 spectrophotometer using phase discrimination and a single detector. Rev. Sci. 

 Instr., 21: 203-212. 



Sawyer, R. A. (1920) The vacuum hot-spark spectrum of zinc in the extreme ultra- 

 violet region. Astrophys. J., 52: 286-300. 



(1951) Experimental spectroscopy. 2nd ed., Prentice-Hall, Inc., New York. 



Sawyer, R. A., and A. L. Becker (1923) The explosion spectra of the alkaline earth 

 metals. Astrophys. J., 57: 98-113. 



Sawyer, R. A., and H. B. Vincent (1939) Characteristics of spectroscopic light 

 sources. In, Proc. 6th summer conference on spectroscopy and its applications. 

 John Wiley & Sons, Inc., New York. 



Schlesman, C. H., and F. G. Brockman (1945) Alternating-current bolometer for 

 infra-red spectroscopy. J. Opt. Soc. Amer., 35: 755-760. 



Schneider, E. G. (1934) A note on the photographic measurement of the transmission 

 of fluorite in the extreme ultraviolet. Phvs. Rev., 45: 152-153. 



