The following are the determinations of some glasses-- +-------------+----------+-------------------------+ | | | |Percentage | | | | |of Luminosity| | | Wave- | | of Light | | Glasses |lengths of|Percentage | Transmitted | | Measured. | Dominant | of White | through | | | Ray. | Light. | the Glass. | +-------------+----------+-----------+-------------+ | Ruby | 6220 | 2 | 13·1 | | Canary | 5850 | 26 | 82·0 | | Bottle Green| 5510 | 31 | 10·6 | | No. 1 Signal| | | | | Green | 4925 | 32 | 6·9 | | No. 2 Signal| | | | | Green | 5100 | 61 | 19·4 | | Cobalt | 4675 | 42 | 3·75 | +-------------+----------+-----------+-------------+ The following are determinations of some coloured pigments-- +--------------+------------+----------+---------------+ | | | | Percentage | | | |Percentage|of Luminosity, | | |Wave-lengths| of | White | | Coloured |of Dominant | White | Paper | | Papers. | Ray. | Light. | being 100. | +--------------+------------+----------+---------------+ |Vermilion | 6100 | 2·5 | 14·8 | |Emerald Green | 5220 | 59·0 | 22·7 | |French Ultra- | | | | | marine Blue | 4720 | 61·0 | 4·4 | |Brown Paper | 5940 | 50·0 | 25·0 | | " " | 5870 | 67·0 | 19·5 | |Orange | 5915 | 4·0 | 62·5 | |Chrome Yellow | 5835 | 26·0 | 77·7 | |Blue Green | 5005 | 42·5 | 14·8 | |Eosin Dye | 6400 | 72·0 | 44·7 | |(Sporting | | | | | Times) | | | | |Cobalt | 4820 | 55·5 | 14·5 | +--------------+------------+----------+---------------+ CHAPTER XIV. Complementary Colours--Complementary Pigment Colours--Measurement of Complementary Colours.