Three Arc Carbon Micro Projectors, 20th Century,
English Arc Lamp by Westminister of London bearing a Patent 9225 1910 mark on the top and a 4088 stamp on the brass fitting; a German carbon arc micro projector microscope lamp, c. 1920, used in elementary chemical microscopy with a plaque at the side for Ernst Leitz Wetzlar, clockwork driven on cast iron base with rack and pinion adjustment to the arcs; an arc microscope lamp by an unidentified maker; and three boxes of arc carbon rods for micro-projectors.

Arc lamps produce light by generating an electric arc across two conducting electrodes, in these cases carbon rods. Used for street lighting, magic lantern shows, etc.

Largest Dimensions: H: 8 1/4 x W: 7 3/4 x D: 3 in.

Westminster Arc Lamp, Powerhouse Collection, Object No. H7503 Leitz microscope is without a hood with bulls-eye lens. Arc rods have not been counted. Devices untested. All have wear and grime commensurate with age and use.