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  1. Trans. I. E. S.,  101, pp. 203–208; 1915.
  2. ; May, 1917.
  3. Jour. Frank. Inst.,  188, p. 219; 1919.
  4. ; table 3, last column; 1923.
  5. The visual transmissive measurements were made by Dr. M. K. Frehafer.
  6. The illustrations were made by Mr. C. L. Snow.
  7. Loc. cit.
  8. The actual figures used in this computation were 0.62436 and 0.69973 instead of those given. Likewise, throughout the paper, the complete numbers were retained in the various computations.
  9. Loc. cit.
  10. Gibson and Tyndall, loc. cit.

1919 (1)

Jour. Frank. Inst.,  188, p. 219; 1919.

1915 (1)

Trans. I. E. S.,  101, pp. 203–208; 1915.

Gibson,

Gibson and Tyndall, loc. cit.

Tyndall,

Gibson and Tyndall, loc. cit.

Jour. Frank. Inst. (1)

Jour. Frank. Inst.,  188, p. 219; 1919.

Trans. I. E. S. (1)

Trans. I. E. S.,  101, pp. 203–208; 1915.

Other (8)

; May, 1917.

; table 3, last column; 1923.

The visual transmissive measurements were made by Dr. M. K. Frehafer.

The illustrations were made by Mr. C. L. Snow.

Loc. cit.

The actual figures used in this computation were 0.62436 and 0.69973 instead of those given. Likewise, throughout the paper, the complete numbers were retained in the various computations.

Loc. cit.

Gibson and Tyndall, loc. cit.

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Figures (2)

Fig. 1
Fig. 1

Spectral characteristics of test solutions used, in heterochromatic photometry.

Fig. 2
Fig. 2

Comparative values of Y/B and λc for light of a color temperature of 2077°K.

Tables (3)

Tables Icon

Table 1 Values of SPECTRAL TRANSMITTANCE, Tλ, of Test Solutions Used in Heterochromatic Photometry.

Tables Icon

Table 2 Values of SPECTRAL TRANSMISSION, Tλ, of Cells Filled with Test Solutions as Used in Heterochromatic Photometry

Tables Icon

Table 3 Integral Light Transmissions and Y/B Ratio Spectral Energy Distribution—Planckian Radiator at 2077° K Spectral Transmissions—Table 2. Visibilities—As noted

Equations (1)

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T Y = 0.626 , T B = 0.627 5 , Y / B = 0.998.