quadrant electrometer
Date1890-1920
Inventory Number0203a,b
ClassificationElectrometer
Subject
Maker
American
?
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Use
Dimensions57 × 36 × 33.8 cm (22 7/16 × 14 3/16 × 13 5/16 in.)
Material
DescriptionBrass quadrants mounted on brass rods with mirror in the center of the quadrants. Glass jar underneath and 2 small ones mounted above in brass cups for sulfuric acid (for drying). All contained in a tall, rectangular wooden box with 2 glass panels. Supported on a square brass stand with 3 legs and leveling screws. Brass suspension tube (missing).
Signedunsigned
FunctionQuadrant electrometers are used for absolute measurements of electrostatic potentials. For more information and other types of such electrometer, go to the following website.
ProvenanceFrom the Department of Physics, Harvard University.
American
Date: circa 1930
Accessories: one broken part; covering case
Object number: 0197a,b
James White
Date: 1854-1884
Accessories: misc. parts found inside the instrument are now boxed seperately (1997-1-0657b)
Object number: 1997-1-0657a
James White
Date: 1854-1884
Accessories: Extra parts contain; 38 components, 20 brass screws and a bag of metal cutouts.
Object number: 1997-1-0657b
Société Centrale de Produits Chimiques
Date: circa 1900
Object number: 0196