Polyprism

ABDNP:200587a

Brass stand on circular brass base with adjustable arm at top holding a brass mounted 6 layered 60 degree prism. The arm can only be adjusted in the angle of the prism, not the height.

1860-1890

Radius (base) 50mm, height (stand) 380mm, radius (stand) 8mm, length (arm) 80mm
height (prism) 58mm, length (sides) 38mm

Brass (stand), Sheet metal (arm), glass (prism)

London

W. LADD