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  1. A. J. Reardon and H. P. Griggs, J. Opt. Soc. Am. 24, 331 (1934).
    [Crossref]
  2. J. Eggert and W. Noddack, Sitzungsber. preuss. Akad. wiss. p. 631 (1921).
  3. J. Eggert and W. Noddack, Naturwiss. 15, 57 (1927).
    [Crossref]
  4. A. P. H. Trivelli, J. Frank. Inst. 209, 373 (1930).
    [Crossref]
  5. A. P. H. Trivelli and E. C. Jensen, J. Frank. Inst. 209, 37 (1930).
    [Crossref]
  6. In this paper all logarithms are to base 10.
  7. B. Walter, Ann. d. Physik [4],  27, 83 (1908).
    [Crossref]
  8. N. F. Mott, Phot. J. 78, 286 (1938).
  9. J. H. Webb and C. H. Evans, J. Opt. Soc. Am. 30, 445 (1940).
    [Crossref]
  10. L. Silberstein, J. Opt. Soc. Am. 31, 343 (1941). J. H. Webb, J. Opt. Soc. Am. 29, 309 (1939); J. Opt. Soc. Am. 31, 348, 559 (1941).
    [Crossref]
  11. J. H. Webb, J. Opt. Soc. Am. 31, 348 (1941).
    [Crossref]
  12. F. E. Ross, Physics of the Developed Photographic Image (van Nostrand, New York, 1924) p. 55.
  13. R. A. Houston, Phil. Mag. [7],  21, 1113 (1936).

1941 (2)

1940 (1)

1938 (1)

N. F. Mott, Phot. J. 78, 286 (1938).

1936 (1)

R. A. Houston, Phil. Mag. [7],  21, 1113 (1936).

1934 (1)

1930 (2)

A. P. H. Trivelli, J. Frank. Inst. 209, 373 (1930).
[Crossref]

A. P. H. Trivelli and E. C. Jensen, J. Frank. Inst. 209, 37 (1930).
[Crossref]

1927 (1)

J. Eggert and W. Noddack, Naturwiss. 15, 57 (1927).
[Crossref]

1921 (1)

J. Eggert and W. Noddack, Sitzungsber. preuss. Akad. wiss. p. 631 (1921).

1908 (1)

B. Walter, Ann. d. Physik [4],  27, 83 (1908).
[Crossref]

Eggert, J.

J. Eggert and W. Noddack, Naturwiss. 15, 57 (1927).
[Crossref]

J. Eggert and W. Noddack, Sitzungsber. preuss. Akad. wiss. p. 631 (1921).

Evans, C. H.

Griggs, H. P.

Houston, R. A.

R. A. Houston, Phil. Mag. [7],  21, 1113 (1936).

Jensen, E. C.

A. P. H. Trivelli and E. C. Jensen, J. Frank. Inst. 209, 37 (1930).
[Crossref]

Mott, N. F.

N. F. Mott, Phot. J. 78, 286 (1938).

Noddack, W.

J. Eggert and W. Noddack, Naturwiss. 15, 57 (1927).
[Crossref]

J. Eggert and W. Noddack, Sitzungsber. preuss. Akad. wiss. p. 631 (1921).

Reardon, A. J.

Ross, F. E.

F. E. Ross, Physics of the Developed Photographic Image (van Nostrand, New York, 1924) p. 55.

Silberstein, L.

Trivelli, A. P. H.

A. P. H. Trivelli, J. Frank. Inst. 209, 373 (1930).
[Crossref]

A. P. H. Trivelli and E. C. Jensen, J. Frank. Inst. 209, 37 (1930).
[Crossref]

Walter, B.

B. Walter, Ann. d. Physik [4],  27, 83 (1908).
[Crossref]

Webb, J. H.

Ann. d. Physik [4] (1)

B. Walter, Ann. d. Physik [4],  27, 83 (1908).
[Crossref]

J. Frank. Inst. (2)

A. P. H. Trivelli, J. Frank. Inst. 209, 373 (1930).
[Crossref]

A. P. H. Trivelli and E. C. Jensen, J. Frank. Inst. 209, 37 (1930).
[Crossref]

J. Opt. Soc. Am. (4)

Naturwiss. (1)

J. Eggert and W. Noddack, Naturwiss. 15, 57 (1927).
[Crossref]

Phil. Mag. [7] (1)

R. A. Houston, Phil. Mag. [7],  21, 1113 (1936).

Phot. J. (1)

N. F. Mott, Phot. J. 78, 286 (1938).

Sitzungsber. preuss. Akad. wiss. (1)

J. Eggert and W. Noddack, Sitzungsber. preuss. Akad. wiss. p. 631 (1921).

Other (2)

In this paper all logarithms are to base 10.

F. E. Ross, Physics of the Developed Photographic Image (van Nostrand, New York, 1924) p. 55.

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Figures (8)

Fig. 1
Fig. 1

Blackening curve of photographic emulsion.

Fig. 2
Fig. 2

Blackening curves of Ultra-Speed x-ray film with x-ray and optical exposures.

Fig. 3
Fig. 3

Curves from formula based on simple probability.

Fig. 4
Fig. 4

Curves obtained when solarization is added to the simple probability formula.

Fig. 5
Fig. 5

Ross’ curves based on various absorption probabilities.

Fig. 6
Fig. 6

Ross’ curves with solarization added. r=1 and s=64.

Fig. 7
Fig. 7

Ross’ curves with solarization added. r=1 and n=8.

Fig. 8
Fig. 8

Comparison of calculated curve with experimental densities.

Tables (2)

Tables Icon

Table II Constants of the curves of Fig. 6. r=1, s=64.

Tables Icon

Table III Constants of the curves of Fig. 7. r=1, n=8.

Equations (3)

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D = e - y m = r y m / m !
D = D m [ 1 - ( 1 / n ) m = 0 n - 1 exp ( - a m y ) ] .
D = 1 n m = 0 n - 1 [ a m y + ( a m y ) 2 2 ! + + ( a m y ) s - 1 ( s - 1 ) ! + ( a m y ) t t ! + ( a m y ) t + 1 ( t + 1 ) ! + ]