LITERARY SCRAPS
... LITERAR SRAPS. P'LUUMATIC MIRaaor.-'T'he attention of the Roydl Institu. lion was called to a new process for converting plate glass into convex and concave mirrors, by a UlOSt simple process, Ain iron casi being, pravided, n circular plate of glass is fixed into it aid madle perfectly air tight, leaving a chatriber at the back toll of common air. By drawing oat that air, either nith in a ir ...