Measurement of light and colour sensations : a new method of investigating the phenomena of light and colour by means of the selective absorption in coloured glass, graded into scales of equivalent colour value
Lovibond, Joseph W. (Joseph Williams), 1835-1918, George Gill and Sons, publisher · London : George Gill and Sons, Minerva House, Warwick Lane, E.C. · leaf 20
■ 17 THE APPAEATUS. A separate stand is required for cells which are longer than two inches. The method of arrangement is shown in Fig-. 3, where one end of the longer cell rests on the stand, a, which also carries the optical instrument, b, whilst the other is supported by a separate stand, f,… … Fig. 3. Fig. 4 shows the arrangement for measuring colour in opaque objects. The optical instrument, b, is here shown as a binocular, but the monocular de- scribed in Fig. 2 fits equally well into the shoe at a1, the bottom of which is commanded by both tubes of the instrument. Under one side, at…
Color · Light · Optics
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