Faraday's Ring or Hysteresis Coil
name: label: maker
content: Gaertner Scientific Corporation
notes: label: Description
content: Here, a circular coil and three pairs of binding posts are mounted on a wooden base marked “WOOD / O.D. 100 / I.D. 71” while a metal bar is marked “WM GAERTNER & CO. / CHICAGO.” L. E. Knott called this small instrument a Faraday’s Ring and Demonstration Transformer, describing it as a simple apparatus “designed for study of the principles and laws involved in self and secondary induction.” The Chicago Apparatus Co. called it a “Hysteresis Coil. Designed to meet the requirements of Experiment No. 15 in Millikan and Mills, ‘Electricity, Sound and Light.’”
label: Description
content: Ref: Robert Andrews Millikan and John Mills, <i>A Short University Course in Electricity, Sound and Light</i> (Boston, 1908), pp. 164-165.
label: Description
content: Wm. Gaertner Co. <i>Catalog</i> (Chicago, 1929), p. 2.
label: Description
content: L. E. Knott Apparatus Co., <i>Catalogue of Physical Instruments</i> (Boston, 1912), p. 466.
label: Description
content: Chicago Apparatus Co., <i>Physical Instruments, Apparatus, and Supplies</i> (Chicago, ca. 1931), p. 239.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: Richard J. Zitto
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2010.0235.44
label: catalog number
content: 2010.0235.44
label: accession number
content: 2010.0235
objectType: label: Object Name
content: Faraday’s ring or hysteresis coil
physicalDescription: label: Physical Description
content: wood; metal (overall material)
label: Measurements
content: overall: 1 3/4 in x 7 1/2 in; 4.445 cm x 19.05 cm