| 70 | 290 | 84·5 | 23·5 | 88·5 | | 50 | 310 | 65·5 | 18·10 | 90·0 | | 30 | 330 | 46·5 | 12·95 | 92 | | 20 | 340 | 37·0 | 10·15 | 94 | | 10 | 350 | 27·5 | 7·65 | 98 | +--------+---------+----------+---------+------------+ FRENCH ULTRAMARINE BLUE. +-----------------------------------------+------------+ | White Sectors. | | +-----------------+-----------+-----------+ Reading of | |Original Setting.| White | Corrected | Spectrum | +--------+--------+ corrected | White | Scale. | | White. | Black. | for black.| 100. | | +--------+--------+-----------+-----------+------------+ | 0 | 360 | 18·0 | 5·0 | 84 | | 10 | 350 | 27·5 | 7·65 | 80 | | 20 | 340 | 37·0 | 10·15 | 77 | | 30 | 330 | 46·5 | 12·95 | 75 | | 40 | 320 | 56·0 | 15·6 | 74 | | 60 | 300 | 75·0 | 20·7 | 72·5 | | 80 | 280 | 94·0 | 25·5 | 70·5 | | 100 | 260 | 113·0 | 32·5 | 68 | | 120 | 240 | 132·0 | 37·2 | 66·5 | | 140 | 220 | 151·0 | 42·3 | 62·5 | | 160 | 200 | 170·0 | 47·4 | 59·5 | | 170 | 190 | 179·5 | 50·0 | 55 | | 160 | 200 | 170·0 | 47·4 | 51 | | 140 | 220 | 151·0 | 42·3 | 46 | | 0 | 360 | 18·0 | 5·0 | 95 | | 10 | 350 | 27·5 | 7·65 | 98 | | 20 | 340 | 37·0 | 10·15 | 99 | | 30 | 330 | 46·5 | 12·95 | 110 | +--------+--------+-----------+-----------+------------+ These three measurements have been given in full, since they will be useful for reference when other experiments are described. Fig. 16.--Method of obtaining two Patches of identical Colour.