. Colour : an elementary manual for students. AdvaniCLTbg ajvd Retiring 23. (see- page, Lustre Produced, w, J3uzocu2ar 29. (see page *^j -J07.) Vincent Breaks Lay A .lun ,Lilk. ] CONTRAST OF TONE. 97 one direction from one or from both the trial pieces,and will therefore itself produce a contrast. To minimisethe complication thus introduced we may try our firstexperiment for producing the phenomena of tone-contrastin three ways, using three backgrounds with identicaltrial pieces on each. We first take two strips of palegrey paper, A and a in Fig. 24, an
. Colour : an elementary manual for students. AdvaniCLTbg ajvd Retiring 23. (see- page, Lustre Produced, w, J3uzocu2ar 29. (see page *^j -J07.) Vincent Breaks Lay A .lun ,Lilk. ] CONTRAST OF TONE. 97 one direction from one or from both the trial pieces,and will therefore itself produce a contrast. To minimisethe complication thus introduced we may try our firstexperiment for producing the phenomena of tone-contrastin three ways, using three backgrounds with identicaltrial pieces on each. We first take two strips of palegrey paper, A and a in Fig. 24, and place them a fewinches apart on a large sheet of paper in a good then prepare two similar strips of a considerablydarker shade of grey, b and b, and place them, as shownin the figure, one alongside of A and the other the samedistance from b as a is from a. Upon steadily looking Pale a PaleA DarkB DarkB Pig. 21. at the four strips for a short time it will be seen that aclose to b appears lighter than, a, which lies at somedistance, while B appears correspondingly darker than effect of
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