Colour-matching on textiles : a manual intended for the use of dyers, calico printers, and textile colour chemists (1901)
Paterson, David · London : Scott, Greenwood & Son ; New York : D. Van Nostrand Co. · leaf 28
nary “ magnifying glass ”. The convexity of this lens can be varied by the action of the ciliary muscles (see C.M.),. and in this way near and distant objects can readily be focussed. With the advancement of age, however, the lens loses its elasticity and becomes denser. It is then not possible to… … Sometimes, as the crystalline lens grows dense with age,, it also acquires a yellowish tinge. This alters considerably the appearances of colours, especially those belonging to the blue and violet class. The yellow tinge absorbs a certain amount of its complementary blue, and an observer having…
Dyes and dyeing · Color in the textile industries
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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