Colour measurement and mixture. Published under the direction of the Committee of General Literature and Education appointed by the Society for Promoting Christian Knowledge (1891)
Abney, William de Wiveleslie, Sir, 1843-1920, Society for Promoting Christian Knowledge (Great Britain). General Literature Committee · London: Society for promoting Christian knowledge; New York, E. & J. B. Young & co. · leaf 23
has found that the lightemitted by this crater in thepositive pole is, within the limits Of the error of observ- Fig. 2.-The Carbon Poles ation, always of the same white- of an Electric Lisht-ness, and consequently gives a spectrum which isunvarying in the proportionate intensities of thedifferent… … COLOUR MEASUREMENT AND MIXTURE. 21 two places in the violet where there are bands ofviolet lines slightly brighter than the general spec-trum. They are principally due to the light emittedfrom the incandescent vapour of carbon, which isvolatilized and plays between the two poles (seeFig. 2); but as…
Color
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