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Standard Conditions for Intensity Measurements by Rotatory Dispersion Colorimelric Photometer
Source Alone
Filter
ϕ1,s
ϕs or ϕ2,s
λc,s
Rs
T
λc
2077°K
581.02mμ
Simple
——
101.8
581.02mμ
1.000
2360°
577.06
“
——
102.0
577.06
1.000
2848°
571.92
“
——
102.0
571.93
0.999
2848°
571.92
Duplex
102.0
102.0
571.94
0.998
Table 2
Comparison of Observed and Computed Values of Color Temperature, Spectral Centroid, and Integral Transmission in the Case of Light at 2360° K, Transmitted by Three Blue (Daylight) Glass Filters, Nos. 1, 6 and 9. (Nov.-Dec., 1924)
Computations from spectrophotometric data.
Average of 6 observers, reduced to normal. Measurements by B. S. Photometry Section.
10 observations comprise a determination.
Observed values minus average of computed and flicker photometry values divided by latter values and multiplied by 100.
Table 3
Comparison of Observed and Computed Values of Color Temperature, Spectral Centroid, and Integral Transmission in the Case of Light at 2848° K, Transmitted by Ives-Brady Daylight Glass (B. S. Designation, Letter of 12/2/21.)
Computations from spectrophotometric data.
10 observations comprise a determination, except for those marked * for which but 5 observations were made.
Observed minus computed values divided by latter and multiplied by 100.
Color temperature and spectral centroid arbitrarily set at values given.
Tables (3)
Table 1
Standard Conditions for Intensity Measurements by Rotatory Dispersion Colorimelric Photometer
Source Alone
Filter
ϕ1,s
ϕs or ϕ2,s
λc,s
Rs
T
λc
2077°K
581.02mμ
Simple
——
101.8
581.02mμ
1.000
2360°
577.06
“
——
102.0
577.06
1.000
2848°
571.92
“
——
102.0
571.93
0.999
2848°
571.92
Duplex
102.0
102.0
571.94
0.998
Table 2
Comparison of Observed and Computed Values of Color Temperature, Spectral Centroid, and Integral Transmission in the Case of Light at 2360° K, Transmitted by Three Blue (Daylight) Glass Filters, Nos. 1, 6 and 9. (Nov.-Dec., 1924)
Computations from spectrophotometric data.
Average of 6 observers, reduced to normal. Measurements by B. S. Photometry Section.
10 observations comprise a determination.
Observed values minus average of computed and flicker photometry values divided by latter values and multiplied by 100.
Table 3
Comparison of Observed and Computed Values of Color Temperature, Spectral Centroid, and Integral Transmission in the Case of Light at 2848° K, Transmitted by Ives-Brady Daylight Glass (B. S. Designation, Letter of 12/2/21.)
Computations from spectrophotometric data.
10 observations comprise a determination, except for those marked * for which but 5 observations were made.
Observed minus computed values divided by latter and multiplied by 100.
Color temperature and spectral centroid arbitrarily set at values given.