The elements of natural and experimental philosophy .. (1834)
Phillips, R. (Richard), Sir, 1767-1840, Smith, E. A · New York, M'Elrath, Bangs & Herbert · leaf 154
glass in a hole of a window shut-ter, and, if nolight enters the room but throughthe glass, the pictures or images of all objects onthe outside may be seen in an inverted positionon a white paper placed in the focus of the lens.If the convex lens be placed in a tube in the in-side of a box, within… … ij-moves round a hinge PQ.. and■ when open, as in the figure.j -j^ it carries two lateral boardsGJ- which serve to exclude the external light as much as possible from the rough glass O, uponwhich the observer is to look. The foreside of the box is want-ing, and in that aperture an other narrower…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from I.[-VI.] pars Romanae vrbis topographiae & antiquitatum, quâ succinctê & breviter describuntur omnia quae tam publicê quam privatim videntur anim-adversione digna: (1597)](https://img.insideoutlibrary.com/img/200/ia-iviparsrompt1thru3bois-628-387.webp)
