Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 350
ICAL INSTRUMENTS. 347 The Portable Camera for Artists. 335. For taking views, the camera obscura should helight and portable. The best form is that shown in Fig. 230.It consists of a sort of portable tent of black cloth, withinwhich is a table for receiving the image, and at the top ofwhich is a… … Fig. 231 shows the course of the rays in forming theimage. The rays coming from the object, AJ3, fall uponthe convex face of the lens and are converged, and in thisstate they reach the plane surface, m, which is inclined tothe horizon. Being totally reflected from the surface, m,they emerge through…
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
