Accession Number: 2009.uc.6
Brown insulator board composed of 20 brass plates; each row numbered 1-10 in descending order; each plate is associated with a corresponding hold for brass pegs and a coil of resistant wire below the board, which are either bare metal or bright green; two removable brass pegs with brown insulator head; two brass knobs located at the top corners of the insulator board;. resistance coils encased in a plexiglass case.
Primary Materials: metal, wood, plexiglass
The topmost brass plate stamped “108 J.S. Plaskett”; one green coil has “DK” written on its bottom; the plexiglass case used to be labeled with a sticker that said “20” on the side.
Dimensions (cm): Height = 12, Width = 12.5, Length = 15
Used for producing desired electrical resistances in electrical experiments.
Manufacturer: J.S. Plaskett
Date of Manufacture: Late 19th C.
J. S. Plaskett, professor at U of T. (not the instrument maker)