Nobili astatic galvanometer
date: label: date made
content: ca 1865
name: label: maker
content: Ruhmkorff, Heinrich Daniel
notes: label: Description (Brief)
content: A galvanometer with a glass cover and a copper plate above coil. Nameplate "Ruhmkorff a Paris", On end of tangent screw shaft: "13", Four binding posts.
label: Description (Brief)
content: In 1825, Leopoldo Nobili (1784-1835), an Italian physicist, introduced a sensitive astatic galvanometer that could detect relatively small electric currents, and that was soon popular with scientists around the world. The Smithsonian purchased this example for use by Joseph Henry, the founding Secretary of the Institution. The "Ruhmkorff a Paris" inscription refers to Heinrich Daniel Ruhmkorff (1803-1877), a German instrument maker who established a shop in Paris in 1855. Reference: Leopoldo Nobili, Leopoldo, "Sur un nouveau galvanomètre présenté à l'Académie des Sciences," Bibliothèque Universelle 29 (1825): 119–125.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Smithsonian Instituteion Instrument Room
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314740
label: catalog number
content: 314740
label: accession number
content: 210894
objectType: label: Object Name
content: Galvanometer
physicalDescription: label: Measurements
content: overall: 10 in x 6 in; 25.4 cm x 15.24 cm