quadrant electrometer
notes: label: Description (Brief)
content: Quadrant electrometer for measuring static charges. A brass frame with glass bell jar cover set on a brass base mounted on three brass leveling legs. A glass tray set on the base contains rocks. Four brass plates are mounted on glass pillars around the glass tray, one plate for each quadrant of the circle. The two plates toward the back at attached to handles that extend from under the base. A wire connects the quadrant 1 plate with the quadrant 3 plate. Another wire (corroded) is attached to the quadrant 2 plate and appears to have been attached to the quadrant 4 plate. Two black oval plates are set on opposite sides of the meter, and are attached to turn-handles that also extend from under the base. A glass Leyden jar (3/4 coated on both inside and outside) is mounted on a brass post above the plates, open side down. No extant maker's markings. The unit was part of a transfer of equipment from the A.P.O. Instrument Room.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: Transfer from Smithsonian Institution
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314734
label: catalog number
content: 314734
label: accession number
content: 210894
objectType: label: Object Name
content: meter
label: Object Name
content: electrometer
physicalDescription: label: Measurements
content: overall: 16 1/2 in x 6 1/2 in; 41.91 cm x 16.51 cm