Bauhaus-Universität Weimar

Titel:
Helmholtz's treatise on physiological optics. Volume 2. Edited by James P. C. Southall. Translated from the 3rd German edition
Person:
Helmholtz, Hermann von
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39650/414/
K. 338, 339.] 
I. Normal and Anomalous Colour Systems 
401 
of the stimulus values for dichromats, knowing that for one class of 
dichromats the stimulus value of yellow-green light is about 20 times 
that of red light and for the other class about twice that of red light. 
The calculated distribution agrees very satisfactorily with that found 
for dichromats, as the following table shows. 
Wave-length 
of the 
Homogeneous 
Light 
Amounts of Lights 
670.8 and 552mm 
in the mixture 
Stimulus Value 
for the eye of the 
green-blind 
Stimulus Value 
for the eye of the 
red-blind 
670.8 | 
552 
Calculated 
Observed 
Calculated 
Observed 
0 (670.8) 
88.5 
_ 
33 
33 
4.9 
4.9 
3 (628 mm) 
251 
10.0 
106 
107 
28.8 
38.5 
4 (615 mm) 
276 
27 
126 
147 
54.2 
63 
5 (603 mm) 
270 
49 
145 
151 
86 
84 
6 (591 mm) 
202 
67 
135 
137 
108 
105 
7 (581 mm) 
123 
76 
114 
124 
117 
113 
8 (571 mm) 
73 
91 
110 
103 
137 
126 
9 (561 mm) 
21 
80 
76 
82 
111 
106 
10 (552 mm) 
I 
71 
64 
64 
101 
101 
Thus it may be generally stated as a result of calculation, invariably 
verified in individual cases by experimental test, that colour matches
        

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