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: 2011.ph.486
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.
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:
- Donated to UTSIC