PLANE OF PICTURE
\plˈe͡ɪn ɒv pˈɪkt͡ʃə], \plˈeɪn ɒv pˈɪktʃə], \p_l_ˈeɪ_n ɒ_v p_ˈɪ_k_tʃ_ə]\
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The plane on which the picture is supposed to be drawn in the various kinds of projection is called the Plane of the picture, or the P. of projection. The P. of reflexion (or refraction) is the plane which contains the incident and reflected (or refracted) rays.
By Henry Percy Smith
