The science of vision; or, Natural perspective ... constituting the basis of the art of design, with ... the new optical laws of the camera obscura, or daguerrèotype, also the physiology of the human eye ..
Arthur Parsey's 1840 London treatise from Longman & Co. sets out a theory of natural perspective for designers, artists and students of the camera obscura and daguerreotype. The plates are numbered line diagrams of geometric solids, such as cubes, pyramids and prisms, with construction lines radiating to vanishing points and horizon lines drawn beneath. A designer could borrow their clean technical grid of converging projection lines as a structural device for layouts or architectural drawing.
