l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 87 



(3) Coblentz, W. W., Dorcas, M. J., and Hughes, C. W. 



1926. Radiometric measurements on the carbon arc and other light 

 sources used in phototherapy. Sci. Pap. Bur. Stand., vol. 21, 

 no. 539, pp. 543, 546. 



(4) Coblentz, W. W., Stair, R., and Hague, J. M. 



1932. Ultra-violet filter radiometry. Bur. Stand. Journ. Res., vol. 8, 

 no. 6, p. 771, June. 



(5) Harrison, G. R., and Forbes, G. S. 



1925. Spectral energy characteristics of the mercury vapor lamp. 

 Journ. Opt. Soc. Amer., vol. 10, no. i, pp. 1-17, Jan. 



(6) Hulburt, E. O. 



1928. The intensities of the lines in the spectrum of mercury. Phys. 

 Rev., ser. 2, vol. ;i2, no. 4, pp. 595, 597, Oct. 



(7) Simon, H., and Suhrmann, R. 



1932. Lichtelektrische Zellen. J. Springer, Berlin. 



(8) Brackett, F. S., and McAlister, E. D. 



1930. The automatic recording of the infra-red at high resolution. Rev. 

 Sci. Instr., vol. i, no. 3, pp. 181-193, Mar. 



