Rowbotham, Thomas Leeson, 1783-1853, Rowbotham, Thomas Charles Leeson, 1823-1875 · London : Winsor and Newton · leaf 36
perpendicular to the plane of the table. The relations of the lines a d and b e with the horizontal line are now changed, and the stick still remaining perpen- dicular to the leaf of the folio, becomes by the change of position perpendicular to the plane of the picture ; and, like all lines… … This diagram (Fig. 17) exemplifies the horizontal right line as seen parallel and perpendicular to the plane of the picture; two of the three relations ascribed to it. The lines so parallel are a b and d e ; the lines so perpendicular are a d, b e, and the stick /.
Landscape drawing · Landscape painting
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
