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 185
i82 COLOUR MEASUREMENT AND MIXTURE. is, however, to have an electro-motor similar tothat which moves the rotating movable sectors … (Fig. 41), and at the end of the spindle to fix a capwith a screw and nut attached. The disc, per- COLOUR MEASUREMENT AND MIXTURE. 183 forated at the centre with a clean-cut hole, can beslipt over the screw, and fastened by the circularnut. When the armature rotates, the disc alsorotates at the…
Color
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