Resistance Box

University College

Accession Number: 2009.uc.4

Instrument Name: Resistance Box

Description:

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 (green coils are numbered sequentially on the bottom from 1-10). Two thick, removable brass pegs with brown insulator heads (only one pictured). Two brass knobs located at the top corners of the insulator board. Topmost brass plate stamped “108 J.S. Plaskett”. Resistance coils encased in a plexiglass case with integral stand, not original to the piece. Plexiglass case formerly had a label “3″ on the bottom.

Alternative Name:

Primary Materials: metal, wood, plexiglass case

Markings: Old Inventory Number = uc4.

Dimensions (cm):

Height = 18.5 cm, Width = 12 cm, Length = 18 cm

Function:

Used for producing desired electrical resistances in electrical experiments.

Condition:

Associated Instruments:

2009.uc.6: http://r1.chass.utoronto.ca/utmusi/display.php?instrument_id=426

Manufacturer: J.S. Plaskett

Date of Manufacture: Late 19th C.

Provenance:

Donated to UTSIC: No

Historical Notes:

J. S. Plaskett, professor at U of T. (not the instrument maker)