Sauzay, A. (Alexandre), 1804-1870 · London, S. Low, son, and Marston · leaf 249
225 means of a curvature, which is obtained by wearing the glass away with moistened emery on moulds or in copper basins. M. Arthur Chevalier* will explain this manufacture to us. The basin serves to make bulged or convex glasses ; and the ball, hollow or concave ones. … Basin. Ball. Fig. 51- " Each tool represents a different radius of curvature. In order to make the tool, the calibre is first fixed by tracing on a copper plate a curve of a given radius. After- wards two cylinders, one concave the other convex, are cut out, which serve to manufacture the basin or…
Glass manufacture · Glassware
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
