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  1. Thomas Young, A Course of Lectures on Natural Philosophy (London, 1807), Vol. II.
  2. F. C. Donders, Brit. Med. J. 2, 768 (1880).
    [Crossref]
  3. H. Helmholtz, Handbuch der physiol. Optik (Leipzig, 1867).
  4. A. König and C. Dieterici, Sitz. d. Akad. d. Wiss. Berlin, p. 805 (1886).
  5. Christian E. Wünsch, Versuche und Beobachtungen über die Farben des Lichtes (Leipzig, 1792), p. 6.
  6. Reference 1, p. 617.
  7. Reference 3, p. 290.
  8. Reference 3, pp. 292–293.
  9. E. Hering, Sitz. d. Akad. d. Wiss. Wien. 70, 169 (1874), Abt. III.
  10. J. Clerk Maxwell, Trans. Roy. Soc. London 150, 57 (1860).
  11. Reference 10, p. 74.
  12. Reference 10, p. 62.
  13. W. D. Wright, “A re-determination of the trichromatic mixture data,” of Med. Research Council (London, 1929).
  14. G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 75 (1943).
    [Crossref]
  15. A. König, Sitz. d. Akad. d. Wiss. Berlin, p. 828 (1886). A. König and C. Dieterici, Zeits. f. Psychol. u. Physiol. d. Sinnesorg. 4, 343 (1892).
  16. See A. König and C. Dieterici, reference 15, p. 336, Fig. 6.
  17. A. König, Sitz.-ber. d. Akad. d. Wiss. Berlin, p. 718 (1897).
  18. A. Fick, “Die Lehre, von der Lichtempfindung,” Hermenn’s Handb. d. Physiol. Vol.  III: 1, pp. 209–210 (1879).
  19. W. de W. Abney, Researches in Colour Vision (London, 1913).
  20. W. de W. Abney, reference 19, p. 230.
  21. A. Weinhold, Ann. d. Physik u. Chem., Neue Folg. 2, 63 (1877).
  22. G. J. Burch, Trans. Roy. Soc. London B191, 1 (1899).
  23. A. Gullstrand, Ber. üb. d. 37. Versamml. d. ophthal. Gesellsch. (Heidelberg, 1911).
  24. A. Cornu, Ann. de l’École norm. [2], Part  9, 21 (1880).
  25. G. F. Göthlin, Handb. d. biol. Arbeitsmethoden, herausgeg. v. E. Abderhalden. Abt. 5, Part 6, Section 931 (Berlin, 1926).
  26. G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 88 (1943).
    [Crossref]

1943 (2)

G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 75 (1943).
[Crossref]

G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 88 (1943).
[Crossref]

1899 (1)

G. J. Burch, Trans. Roy. Soc. London B191, 1 (1899).

1897 (1)

A. König, Sitz.-ber. d. Akad. d. Wiss. Berlin, p. 718 (1897).

1886 (2)

A. König, Sitz. d. Akad. d. Wiss. Berlin, p. 828 (1886). A. König and C. Dieterici, Zeits. f. Psychol. u. Physiol. d. Sinnesorg. 4, 343 (1892).

A. König and C. Dieterici, Sitz. d. Akad. d. Wiss. Berlin, p. 805 (1886).

1880 (2)

A. Cornu, Ann. de l’École norm. [2], Part  9, 21 (1880).

F. C. Donders, Brit. Med. J. 2, 768 (1880).
[Crossref]

1879 (1)

A. Fick, “Die Lehre, von der Lichtempfindung,” Hermenn’s Handb. d. Physiol. Vol.  III: 1, pp. 209–210 (1879).

1877 (1)

A. Weinhold, Ann. d. Physik u. Chem., Neue Folg. 2, 63 (1877).

1874 (1)

E. Hering, Sitz. d. Akad. d. Wiss. Wien. 70, 169 (1874), Abt. III.

1860 (1)

J. Clerk Maxwell, Trans. Roy. Soc. London 150, 57 (1860).

Abney, W. de W.

W. de W. Abney, Researches in Colour Vision (London, 1913).

W. de W. Abney, reference 19, p. 230.

Burch, G. J.

G. J. Burch, Trans. Roy. Soc. London B191, 1 (1899).

Clerk Maxwell, J.

J. Clerk Maxwell, Trans. Roy. Soc. London 150, 57 (1860).

Cornu, A.

A. Cornu, Ann. de l’École norm. [2], Part  9, 21 (1880).

Dieterici, C.

A. König and C. Dieterici, Sitz. d. Akad. d. Wiss. Berlin, p. 805 (1886).

See A. König and C. Dieterici, reference 15, p. 336, Fig. 6.

Donders, F. C.

F. C. Donders, Brit. Med. J. 2, 768 (1880).
[Crossref]

Fick, A.

A. Fick, “Die Lehre, von der Lichtempfindung,” Hermenn’s Handb. d. Physiol. Vol.  III: 1, pp. 209–210 (1879).

Göthlin, G. F.

G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 88 (1943).
[Crossref]

G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 75 (1943).
[Crossref]

G. F. Göthlin, Handb. d. biol. Arbeitsmethoden, herausgeg. v. E. Abderhalden. Abt. 5, Part 6, Section 931 (Berlin, 1926).

Gullstrand, A.

A. Gullstrand, Ber. üb. d. 37. Versamml. d. ophthal. Gesellsch. (Heidelberg, 1911).

Helmholtz, H.

H. Helmholtz, Handbuch der physiol. Optik (Leipzig, 1867).

Hering, E.

E. Hering, Sitz. d. Akad. d. Wiss. Wien. 70, 169 (1874), Abt. III.

König, A.

A. König, Sitz.-ber. d. Akad. d. Wiss. Berlin, p. 718 (1897).

A. König, Sitz. d. Akad. d. Wiss. Berlin, p. 828 (1886). A. König and C. Dieterici, Zeits. f. Psychol. u. Physiol. d. Sinnesorg. 4, 343 (1892).

A. König and C. Dieterici, Sitz. d. Akad. d. Wiss. Berlin, p. 805 (1886).

See A. König and C. Dieterici, reference 15, p. 336, Fig. 6.

Weinhold, A.

A. Weinhold, Ann. d. Physik u. Chem., Neue Folg. 2, 63 (1877).

Wright, W. D.

W. D. Wright, “A re-determination of the trichromatic mixture data,” of Med. Research Council (London, 1929).

Wünsch, Christian E.

Christian E. Wünsch, Versuche und Beobachtungen über die Farben des Lichtes (Leipzig, 1792), p. 6.

Young, Thomas

Thomas Young, A Course of Lectures on Natural Philosophy (London, 1807), Vol. II.

Acta Ophthal. (Copenhagen) (2)

G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 75 (1943).
[Crossref]

G. F. Göthlin, Acta Ophthal. (Copenhagen) 21, 88 (1943).
[Crossref]

Ann. d. Physik u. Chem., Neue Folg. (1)

A. Weinhold, Ann. d. Physik u. Chem., Neue Folg. 2, 63 (1877).

Ann. de l’École norm. [2] (1)

A. Cornu, Ann. de l’École norm. [2], Part  9, 21 (1880).

Brit. Med. J. (1)

F. C. Donders, Brit. Med. J. 2, 768 (1880).
[Crossref]

Hermenn’s Handb. d. Physiol. (1)

A. Fick, “Die Lehre, von der Lichtempfindung,” Hermenn’s Handb. d. Physiol. Vol.  III: 1, pp. 209–210 (1879).

Sitz. d. Akad. d. Wiss. Berlin (2)

A. König, Sitz. d. Akad. d. Wiss. Berlin, p. 828 (1886). A. König and C. Dieterici, Zeits. f. Psychol. u. Physiol. d. Sinnesorg. 4, 343 (1892).

A. König and C. Dieterici, Sitz. d. Akad. d. Wiss. Berlin, p. 805 (1886).

Sitz. d. Akad. d. Wiss. Wien. (1)

E. Hering, Sitz. d. Akad. d. Wiss. Wien. 70, 169 (1874), Abt. III.

Sitz.-ber. d. Akad. d. Wiss. Berlin (1)

A. König, Sitz.-ber. d. Akad. d. Wiss. Berlin, p. 718 (1897).

Trans. Roy. Soc. London (2)

J. Clerk Maxwell, Trans. Roy. Soc. London 150, 57 (1860).

G. J. Burch, Trans. Roy. Soc. London B191, 1 (1899).

Other (14)

A. Gullstrand, Ber. üb. d. 37. Versamml. d. ophthal. Gesellsch. (Heidelberg, 1911).

G. F. Göthlin, Handb. d. biol. Arbeitsmethoden, herausgeg. v. E. Abderhalden. Abt. 5, Part 6, Section 931 (Berlin, 1926).

Reference 10, p. 74.

Reference 10, p. 62.

W. D. Wright, “A re-determination of the trichromatic mixture data,” of Med. Research Council (London, 1929).

Christian E. Wünsch, Versuche und Beobachtungen über die Farben des Lichtes (Leipzig, 1792), p. 6.

Reference 1, p. 617.

Reference 3, p. 290.

Reference 3, pp. 292–293.

Thomas Young, A Course of Lectures on Natural Philosophy (London, 1807), Vol. II.

W. de W. Abney, Researches in Colour Vision (London, 1913).

W. de W. Abney, reference 19, p. 230.

See A. König and C. Dieterici, reference 15, p. 336, Fig. 6.

H. Helmholtz, Handbuch der physiol. Optik (Leipzig, 1867).

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Figures (5)

Fig. 1
Fig. 1

W. D. Wright’s coefficient curves based on trichromatic synthesis of the spectral colors by mixture of standard radiations of the wave-lengths 0.650μ, 0.530μ, and 0.460μ. Average results of 10 observers (see reference 13).

Fig. 2
Fig. 2

Plan of Göthlin’s liminospectroscope. 1. Image of Nernst filament in a slit lamp constructed by Gullstrand. 2. Convex lenses. 3. Trough for heat-absorbing fluid. 4. Holder for ray filter. 5. Polarizing Nicol (rotatory). 6. Analyzing Nicol (fixed). 7. Collimator slit. 8. Collimator lens. 9. Constant deviation prism. 10. Iris diaphragm. 11. Telescope lens. 12. Telescope slit.

Fig. 3
Fig. 3

Diagrammatic representation of the relative energy values of the thresholds for a blue and a red component in spectral indigo, in accordance with determinations by observer R.B.; the parts of columns which are marked with horizontal lines represent sensations of blue; the parts marked with crosses represent sensations of violet. Field 3°.

Fig. 4
Fig. 4

Diagrammatic representation of the relative energy values of the thresholds for a blue and a red component in spectral indigo, in accordance with determinations by observer N.G.A. Field 45′. The significance of the horizontal lines and the crosses inside the columns is the same as in Fig. 3.

Fig. 5
Fig. 5

Diagrammatic representation of the dependence of the quotient T1/T2 on the wave-length according to determinations in spectral indigo by observer R.B. Field 3°.

Tables (4)

Tables Icon

Table I Records of color-threshold determinations carried out with the liminospectroscope in the indigo region of the spectrum. Relative energy values are calculated for the thresholds T1 corresponding to beginning sensation of blue, and T2 corresponding to beginning sensation of red. The energy values are expressed in units of energy valid only for the Wave-length under consideration (see text).

Tables Icon

Table II Records of color-threshold determinations carried out with the liminospectroscope in the indigo region of the spectrum. Relative energy values are calculated for the thresholds T1 corresponding to beginning sensation of blue, and T2 corresponding to beginning sensation of red. The energy values are expressed in units of energy valid only for the wave-length under consideration (see text).

Tables Icon

Table III Serial alternating settings of the threshold for a blue component and for a red component in a radiation of spectral indigo. The settings are given in relative energy values.

Tables Icon

Table IV Tabular survey of the statistical treatment of the threshold values in Table III.

Equations (2)

Equations on this page are rendered with MathJax. Learn more.

v = coefficient of variation = 100 σ / m .
y = α exp ( - B x 2 + γ x ) ,