Calotype (Gr. kalos, 'beautiful;' typos, 'impression') was the name given in 1840 by Dr Fox Talbot to the method of photographing by the action of light on nitrate of silver, invented by him about that date. See PHOTOGRAPHY.
Calotype
Chambers's Encyclopaedia, Volume 2: Beaugency to Cataract, p. 656
Source scan(s): p. 0669