Bryn Mawr College monographs . I 0 10 ^0 JO- ^0 50 (oO 10 SO SO Chart III. Chromatic Thresholds for the Four Colors, Nasal Meridian. In thischart and Chart IV., the values represented in Charts I. and II. respectively, from thecenter of the retina through the region of gradual decrease of sensitivity are plotted \on a larger scale. This is done because when plotted on the scale used in Charts I. and II., the curves fall so closely together that the relative sensitivities are not clearlyrepresented. CHROMATIC THRESHOLDS OF SENSATION 31. 30* 40* 50 Chart IV. Chromatic Thresholds (enlarged scale)
Bryn Mawr College monographs . I 0 10 ^0 JO- ^0 50 (oO 10 SO SO Chart III. Chromatic Thresholds for the Four Colors, Nasal Meridian. In thischart and Chart IV., the values represented in Charts I. and II. respectively, from thecenter of the retina through the region of gradual decrease of sensitivity are plotted \on a larger scale. This is done because when plotted on the scale used in Charts I. and II., the curves fall so closely together that the relative sensitivities are not clearlyrepresented. CHROMATIC THRESHOLDS OF SENSATION 31. 30* 40* 50 Chart IV. Chromatic Thresholds (enlarged scale) for the Four Colors, Temporal Meridian. 32 C. E. FERREE AND GERTRUDE RAND observer. However, one or more check observers have beenused on points of the work of especial importance to theory,such as the irregular distribution of sensitivity to the pairsof colors, the criss-crossing or interlacing of limits, the areasanalogous in type to the Schumann case of color-blindness,the deficiency of sensitivity of the far periphery of the retinato green, and the inability to get a red or green that is stableIn color tone for all parts of the retina. Table III Chromatic Threshold for Yellow, Nasal MeridianIn this table are given the values of the threshold for yellow (581 m/x) at 23 pointsin the nasal meridian. The intensity of light at the analyzing slit was X io~*watt. SurroundingField and Pre- Value of Threshold Total Amount Density of Degree of exposure(Candle-power of Light at Light at Density of Exccntricity Degrees Campimete
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