Letters on natural magic, addressed to Sir Walter Scott
Letters on Natural Magic (London: John Murray, 1832) is David Brewster's popular explanation of optical illusions, mirrors, automata and conjuring effects, written as letters to Sir Walter Scott for general readers. The wood-engraved figures are small keyed diagrams with ruled hatching: light rays traced from concave mirrors to floating images, apparatus in section, and stiff top-hatted observers standing inside the geometry, useful for optical-demonstration schematics and period figures combined with line construction.
