. Thinking, feeling, doing . ared as in Fig. 95, where thelined portion is to be such a disk is spun, thering formed by the mixture of theblack and white should be gray ;it is, however, the color comple-mentary to color on the other portion. Plain red, violet, and blue woven cloths were onone occasion given to manufacturers for ornamentationwith black patterns. When the goods were returned,the complaint was made that the patterns were not black ;those on the red cloth were plainly greenish, those onthe violet were dark greenish yellow, and those on theblue were copper-colored. By
. Thinking, feeling, doing . ared as in Fig. 95, where thelined portion is to be such a disk is spun, thering formed by the mixture of theblack and white should be gray ;it is, however, the color comple-mentary to color on the other portion. Plain red, violet, and blue woven cloths were onone occasion given to manufacturers for ornamentationwith black patterns. When the goods were returned,the complaint was made that the patterns were not black ;those on the red cloth were plainly greenish, those onthe violet were dark greenish yellow, and those on theblue were copper-colored. By covering the cloth in sucha way as to expose only the patterns without the colors,they were seen to be truly black. It was an effect ofcontrast. When we started the subject of color, we agreed totalk for the majority and to attend to persons defectivein color-seeing afterwards. Some of you may have al-ready been puzzled by the apparent blunders the rest ofus have been making. Let us see how we agree. Color Sensitiveness. 173. Fig. 95- Getting the GrayEquation. Suppose To measure the color-sense in different persons thetwo smaller disks, w and d,should be placed over thelarger disks, R, G, and V. Thewhite and black make a gray,and the larger disks should beadjusted to make a gray finer adjustment is obtainedby making both grays alike. The relative proportions ofw and d may be disregardedand gray in general may be indicated by person gets m [= 60 z^+40 d~\ =35 R+30 G+35 Vand another m— 5 R+45 G+50 V. It is evident that the second one is much less sensitive to red ; in fact, such a person would be called speaking, humanity falls into four great classes : (1) the three-color; (2) the two-color red-blind; (3) the two-color green-blind ; (4) the one-color three-color persons form about ninety-five per cent of the males and almost all the females. They are so-called becausethe colors they seecan be produced bycombinations ofthree fundamenta
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpsychop, bookyear1895
