Model demonstrating distortion of image in an old eye Model demonstrating distortion of image in an old eye 1752
Artificial glass horizon in circular fitted wooden case with lid, made by unknown German maker (possibly G.F. Brander, Augsburg?), 1785-1795. Consisting of a circular lacquered brass container with three levelling feet, which holds spirit, covered by a transparent glass plate. When in use, the vessel is filled with spirit leaving an air-gap under the glass to act as a bubble level, which is centred with levelling screws. Artificial glass horizon. 1785-1795
Triangular glass demonstration prism with fruitwood end-piece and finial handle, unsigned, European, 1700-1799. Glass showing typical imperfections of the period. Triangular glass demonstration prism with fruitwood end-piece and finial handle 1700-1799