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Quadrant Electrometer (Cambridge Scientific Co.)


Tall cylinder topped by a long, narrow, 20 cm projection; mounted on circular base on three adjustable metal legs. Tall cylinder contains a glass window attached with screws. Tall middle cylinder raises to reveal operational components which include protoplastic (cellulose nitrate?), metal, glass and wire components.Two of the organge protoplastic pieces are held into place by metal nobs which extend into the bottom of the base. Protoplastic plastic could be bakelite. Also, base connected to legs could be bakelite.

Accession Number:

Alternative Name:

Primary Materials:

Proto plastic (cellulose nitrate?), Metal: Brass, Glass


Exterior ” Cambridge Scientific Instrument Co., Ltd., England, No. 2567″, “378”,

Old catalog no. on tag: “phy 352”, “III 3”

Dimensions (cm): Height = 44cm Diameter =17cm

Function: Measuring electrostatic potential.


Fair: Interior mirror component loose inside cylinder (in plastic bag). Two of the legs have significant corrosion. Scratches, nicks and wear throughout. Some corrosion around top of cylinder which obscures the purposeful markings. Adhesive around exterior window is brittle. Some corrosion at connection between window and metal base – suspected corrosion from the adhesive. Come green corrosion at base between rod and middle cylinder. Half of the large textured section of one of the base plats has a shade change, from light to dark.

Associated Instruments:

Manufacturer: Cambridge Scientific Co., Ltd

Date of Manufacture: cir. Late 19th or early 20th century


University of Toronto Department of Physics

Additional Information and References:

Historical Notes:


  • Donated to UTSIC