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References

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  1. Ham, Fehr, and Bitner, Jour. Franklin Inst.,  178, p. 299; 1924.
    [Crossref]
  2. Winther, ZS. f. wiss. Phot.,  22, p. 125; 1923; ibid, 25, p. 230; 1928; Robertson, this journal,  7, p. 983; 1923; Harrison and Hesthal, this journal,  8, p. 471; 1924.
  3. Landsberg, ZS. f. Phys.,  46, p. 106; 1927.
    [Crossref]
  4. W. Wien, Ann. d. Phys.,  73, p. 499; 1924.
  5. See, for example, Harrison, Phys. Rev.,  24, p. 466; 1924.
    [Crossref]
  6. Harrison, this journal,  17, p. 389; 1928.
  7. Weinland, this journal,  15, p. 337; 1927.

1928 (1)

Harrison, this journal,  17, p. 389; 1928.

1927 (2)

Weinland, this journal,  15, p. 337; 1927.

Landsberg, ZS. f. Phys.,  46, p. 106; 1927.
[Crossref]

1924 (3)

W. Wien, Ann. d. Phys.,  73, p. 499; 1924.

See, for example, Harrison, Phys. Rev.,  24, p. 466; 1924.
[Crossref]

Ham, Fehr, and Bitner, Jour. Franklin Inst.,  178, p. 299; 1924.
[Crossref]

1923 (1)

Winther, ZS. f. wiss. Phot.,  22, p. 125; 1923; ibid, 25, p. 230; 1928; Robertson, this journal,  7, p. 983; 1923; Harrison and Hesthal, this journal,  8, p. 471; 1924.

Bitner,

Ham, Fehr, and Bitner, Jour. Franklin Inst.,  178, p. 299; 1924.
[Crossref]

Fehr,

Ham, Fehr, and Bitner, Jour. Franklin Inst.,  178, p. 299; 1924.
[Crossref]

Ham,

Ham, Fehr, and Bitner, Jour. Franklin Inst.,  178, p. 299; 1924.
[Crossref]

Harrison,

Harrison, this journal,  17, p. 389; 1928.

See, for example, Harrison, Phys. Rev.,  24, p. 466; 1924.
[Crossref]

Landsberg,

Landsberg, ZS. f. Phys.,  46, p. 106; 1927.
[Crossref]

Weinland,

Weinland, this journal,  15, p. 337; 1927.

Wien, W.

W. Wien, Ann. d. Phys.,  73, p. 499; 1924.

Winther,

Winther, ZS. f. wiss. Phot.,  22, p. 125; 1923; ibid, 25, p. 230; 1928; Robertson, this journal,  7, p. 983; 1923; Harrison and Hesthal, this journal,  8, p. 471; 1924.

Ann. d. Phys. (1)

W. Wien, Ann. d. Phys.,  73, p. 499; 1924.

Jour. Franklin Inst. (1)

Ham, Fehr, and Bitner, Jour. Franklin Inst.,  178, p. 299; 1924.
[Crossref]

Phys. Rev. (1)

See, for example, Harrison, Phys. Rev.,  24, p. 466; 1924.
[Crossref]

this journal (2)

Harrison, this journal,  17, p. 389; 1928.

Weinland, this journal,  15, p. 337; 1927.

ZS. f. Phys. (1)

Landsberg, ZS. f. Phys.,  46, p. 106; 1927.
[Crossref]

ZS. f. wiss. Phot. (1)

Winther, ZS. f. wiss. Phot.,  22, p. 125; 1923; ibid, 25, p. 230; 1928; Robertson, this journal,  7, p. 983; 1923; Harrison and Hesthal, this journal,  8, p. 471; 1924.

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Figures (3)

Fig. 1
Fig. 1

Contact prints of the screen patterns used in a typical set of neutral screens. Transmission factors #1, 69.7%; #2, 40.9%; #3, 2.8%; #4, 6.76%. The screens are used in the following order: None, #1, #2, #1 and #2, #3, #1 and #3, #2 and #3, #4, #1 and #4, #2 and #4, #3 and #4. This gives 11 points covering the intensity range 100% to 1.47%.

Fig. 2
Fig. 2

Calibration curves showing the errors which can enter when diffraction effects are not allowed for. The upper curve contains points obtained with calibrated glass filters (marked with triangles) and with wire screens correctly used. The lower curve was obtained with the same screens incorrectly used.

Fig. 3
Fig. 3

Photographs of the image of a beam of light focused on the entrance slit of a spectrograph. a, image without screen, b, image with screen #1 inserted in beam, wires parallel and perpendicular to length of image. c, ditto, with wires at 45°. d, Screen #2 inserted in beam, wires parallel and perpendicular to image.