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References

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  1. E. C. Crittenden and J. Franklin Meyer, Proc. International Congress on Illumination, p. 1138, 1928. H. Buckley, Phil. Mag. 24, 1059 (1937).
  2. H. E. Ives and E. F. Kingsbury, Trans. I. E. S. 10, 203 (1915).
  3. W. F. Little and R. S. Estey, Trans. I. E. S. 32, 628 (1937).
  4. E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 93 (1918).
    [CrossRef]
  5. H. E. Ives and E. J. Brady, Phys. Rev. 4, 222 (1914).
    [CrossRef]
  6. D. B. Judd, J. O. S. A. 23, 359 (1933).
    [CrossRef]
  7. E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 98 (1918). C. C. Patterson, Proc. Phys. Soc. London,  50, 119 (1938).
    [CrossRef]
  8. A. Dresler, Das Licht 7, 81, 107 (1937).
  9. W. E. Forsythe and B. T. Barnes, Rev. Sci. Inst. 4, 289 (1933).
    [CrossRef]
  10. Trans. I. E. S. 28, 268 (1933).

1937 (2)

W. F. Little and R. S. Estey, Trans. I. E. S. 32, 628 (1937).

A. Dresler, Das Licht 7, 81, 107 (1937).

1933 (3)

W. E. Forsythe and B. T. Barnes, Rev. Sci. Inst. 4, 289 (1933).
[CrossRef]

Trans. I. E. S. 28, 268 (1933).

D. B. Judd, J. O. S. A. 23, 359 (1933).
[CrossRef]

1928 (1)

E. C. Crittenden and J. Franklin Meyer, Proc. International Congress on Illumination, p. 1138, 1928. H. Buckley, Phil. Mag. 24, 1059 (1937).

1918 (2)

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 93 (1918).
[CrossRef]

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 98 (1918). C. C. Patterson, Proc. Phys. Soc. London,  50, 119 (1938).
[CrossRef]

1915 (1)

H. E. Ives and E. F. Kingsbury, Trans. I. E. S. 10, 203 (1915).

1914 (1)

H. E. Ives and E. J. Brady, Phys. Rev. 4, 222 (1914).
[CrossRef]

Barnes, B. T.

W. E. Forsythe and B. T. Barnes, Rev. Sci. Inst. 4, 289 (1933).
[CrossRef]

Brady, E. J.

H. E. Ives and E. J. Brady, Phys. Rev. 4, 222 (1914).
[CrossRef]

Crittenden, E. C.

E. C. Crittenden and J. Franklin Meyer, Proc. International Congress on Illumination, p. 1138, 1928. H. Buckley, Phil. Mag. 24, 1059 (1937).

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 93 (1918).
[CrossRef]

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 98 (1918). C. C. Patterson, Proc. Phys. Soc. London,  50, 119 (1938).
[CrossRef]

Dresler, A.

A. Dresler, Das Licht 7, 81, 107 (1937).

Estey, R. S.

W. F. Little and R. S. Estey, Trans. I. E. S. 32, 628 (1937).

Forsythe, W. E.

W. E. Forsythe and B. T. Barnes, Rev. Sci. Inst. 4, 289 (1933).
[CrossRef]

Franklin Meyer, J.

E. C. Crittenden and J. Franklin Meyer, Proc. International Congress on Illumination, p. 1138, 1928. H. Buckley, Phil. Mag. 24, 1059 (1937).

Ives, H. E.

H. E. Ives and E. F. Kingsbury, Trans. I. E. S. 10, 203 (1915).

H. E. Ives and E. J. Brady, Phys. Rev. 4, 222 (1914).
[CrossRef]

Judd, D. B.

D. B. Judd, J. O. S. A. 23, 359 (1933).
[CrossRef]

Kingsbury, E. F.

H. E. Ives and E. F. Kingsbury, Trans. I. E. S. 10, 203 (1915).

Little, W. F.

W. F. Little and R. S. Estey, Trans. I. E. S. 32, 628 (1937).

Richtmyer, F. K.

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 93 (1918).
[CrossRef]

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 98 (1918). C. C. Patterson, Proc. Phys. Soc. London,  50, 119 (1938).
[CrossRef]

Bull. Nat. Bur. Stand. (2)

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 93 (1918).
[CrossRef]

E. C. Crittenden and F. K. Richtmyer, Bull. Nat. Bur. Stand. 14, 98 (1918). C. C. Patterson, Proc. Phys. Soc. London,  50, 119 (1938).
[CrossRef]

Das Licht (1)

A. Dresler, Das Licht 7, 81, 107 (1937).

J. O. S. A. (1)

D. B. Judd, J. O. S. A. 23, 359 (1933).
[CrossRef]

Phys. Rev. (1)

H. E. Ives and E. J. Brady, Phys. Rev. 4, 222 (1914).
[CrossRef]

Proc. International Congress on Illumination (1)

E. C. Crittenden and J. Franklin Meyer, Proc. International Congress on Illumination, p. 1138, 1928. H. Buckley, Phil. Mag. 24, 1059 (1937).

Rev. Sci. Inst. (1)

W. E. Forsythe and B. T. Barnes, Rev. Sci. Inst. 4, 289 (1933).
[CrossRef]

Trans. I. E. S. (3)

Trans. I. E. S. 28, 268 (1933).

H. E. Ives and E. F. Kingsbury, Trans. I. E. S. 10, 203 (1915).

W. F. Little and R. S. Estey, Trans. I. E. S. 32, 628 (1937).

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Figures (8)

Fig. 1
Fig. 1

Transmissions of the yellow and green filters that were obtained from the Osram Company for use in measuring the luminous output of mercury lamps.

Fig. 2
Fig. 2

Transmission of the blue glass filter similar to the one selected by the N.B.S. for use in measuring the high intensity mercury lamps.

Fig. 3
Fig. 3

Transmission of the blue glass filter similar to the one selected by the E.T.L. for use in measuring the output of the high intensity mercury lamps.

Fig. 4
Fig. 4

Transmission of the blue glass filter similar to the one selected by the G.E.V.L. for use in measuring the output of the high intensity mercury lamps.

Fig. 5
Fig. 5

Transmission of the glass screen used in measuring the output of the sodium lamp.

Fig. 6
Fig. 6

Transmission of the screen used between the comparison lamp and the photometer when measuring the green fluorescent lamps.

Fig. 7
Fig. 7

Cross section of the eyepiece and field of the Ives-Brady flicker photometer. C, rotating prism; D, appearance of field; G, limiting diaphragm; F, lamp for illuminating field.

Fig. 8
Fig. 8

I.C.I. color coordinates of the lamps used in this test. A, green fluorescent lamp; A′, comparison lamp as seen through screen whose transmission is shown in Fig. 6; B, blue fluorescent lamp; C, pink fluorescent lamp; D, high intensity mercury lamp; D′, comparison lamp as seen through E.T.L. screen; E, sodium lamp; E′, comparison lamp as seen through screen whose transmission is shown in Fig. 5; F, neon lamp.

Tables (7)

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Table I Measurement of mercury lamp* by a number of observers with a large (L) and a small (S) field.

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Table II Comparison of direct comparison and flicker methods of measuring candlepower.

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Table III Candlepowers of a number of different colored lamps as measured with a flicker photometer.

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Table IV Candlepower of H-1 lamp using flicker photometer with and without color screen (E.T.L.).

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Table V Spectral intensity, milliwatts per steradian, perpendicular to axis of lamp for the lamps used in these tests.

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Table VI Measured and calculated values of the candlepowers of a number of lamps.

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Table VII Relative luminous intensity of the yellow and the green mercury lines as measured by a number of observers using a flicker photometer.

Equations (1)

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T = 0 J ( λ T ) T λ K λ d λ / 0 J ( λ T ) K λ d λ .