LOUR. 112 from that particular spot, and it should make its appearance as a black patch ; but owing to the fact that the upper surface of the glass is reflecting white light, the patch shows itself as a grey ; but being alongside a red patch we have the effect of contrast, and the grey patch… … Fio. 69. in place of employing a red glass, a blue glass were used,. then the grey patch would assume an orange-grey tint. A very interesting series of experiments in contrast may be made by producing shadows of an object with various ooloure<I lights, white, etc., and noting the tints of the…
Color
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
