Abstract
1.—IN GENERAL AND ORTHOCHROMATIC PLATES. IT used to be customary to draw three curves above a diagrammatic spectrum, heat, luminosity, and actinism curves, the last representing the power of light to produce or facilitate chemical change independently of the temperature change. This custom survives to a certain extent, though only one of the curves, namely, the heat curve, is definite. The luminosity curve depends upon the human eye, and eyes vary, sometimes even in the same individual, with regard to their sensitiveness to light and colour. Still, it is possible to draw practically useful luminosity curves in a general sense, and by taking an average human eye, in perhaps almost an absolute sense.
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JONES, C. On Colour Sensitised Plates. Nature 94, 676–677 (1915). https://doi.org/10.1038/094676a0
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DOI: https://doi.org/10.1038/094676a0