EMERALD GREEN.
| White Sectors. | Reading of Spectrum Scale. | |||
| Original Setting. | White Corrected For Black. | Corrected White 100. | ||
| White. | Black. | |||
| 10 | 350 | 27·5 | 7·65 | 50 |
| 20 | 340 | 37·0 | 10·15 | 54 |
| 30 | 330 | 46·5 | 12·95 | 55 |
| 50 | 310 | 65·5 | 18·10 | 57·5 |
| 70 | 290 | 84·5 | 23·5 | 60·0 |
| 90 | 270 | 103·5 | 29·7 | 63·5 |
| 110 | 250 | 122·5 | 34·7 | 65·5 |
| 130 | 230 | 141·5 | 39·5 | 67·5 |
| 150 | 210 | 160·5 | 45·0 | 68·5 |
| 170 | 190 | 179·5 | 50·0 | 71 |
| 190 | 170 | 195·5 | 54·7 | 73·5 |
| 210 | 150 | 217·5 | 60·2 | 75·0 |
| 220 | 140 | 227 | 63·2 | 76 |
| 220 | 140 | 227 | 63·2 | 78 |
| 210 | 150 | 217·5 | 60·2 | 80 |
| 190 | 170 | 198·5 | 54·7 | 82 |
| 170 | 190 | 179·5 | 50·0 | 83 |
| 150 | 210 | 160·5 | 45·0 | 84 |
| 130 | 230 | 141·5 | 39·5 | 85 |
| 110 | 250 | 122·5 | 34·7 | 86·5 |
| 90 | 270 | 103·5 | 29·7 | 87·5 |
| 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 Spectrum Scale. | |||
| Original Setting. | White Corrected For Black. | Corrected White 100. | ||
| White. | Black. | |||
| 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.