An introduction to the study of colour phenomena, explaining a new theory of colour based entirely on experimental facts with applications to scientific and industrial investigations (1905)
Lovibond, Joseph Williams, 1833-1918 · London, E. & F.N. Spon, Limited; New York, Spon & Chamberlain · leaf 14
The optical instrument B fits into the shoeat A, the bottom of which is commanded by both tubes of oneinstrument. Under one side at F is placed the opaque sub-stance to be measured, and under the other, the standardwhite, for reflecting the beam of white light, which is thendissected at J by the… … Fig. 3. D, which fits into the two halves of the cover of the boxB^, these being retained in position by the springs C^.If the light is obtained from a high window, the reflector Hmust be fitted into the cover B, and the box placed so thatboth the openings are equally illuminated on looking…
Color
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