Electromagnetic Apparatus
name: label: maker
content: W. C. & J. Neff
notes: label: Description
content: Small instrument with an “ELECTRO MAGNETIC MACHINES / MANUF. BY / W. C. & J. NEFF / XXX & SEVENTH ST. / PHILA XXX.” inscription. William C. and Jacob Neff were philosophical instrument makers in Philadelphia who began advertising electro-magnetic and magneto-electric machines in the late 1840s.
label: Description
content: Ref: Jacob Neff, “Improvement in Electro-Magnetic Engines,” U.S. Patent 7889 (Jan. 7, 1851).
label: Description
content: W. C. & J. Neff ad in The Presbyterian Historical Almanac for 1858-1859 (Philadelphia, 1859).
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Medicine
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MG.M-04175
label: catalog number
content: M-04175
label: accession number
content: 89797
label: patent number
content: 20,390
label: patent number
content: 020390
objectType: label: Object Name
content: Patent Model, Dental
label: Object Name
content: patent model
label: Object Name
content: electrotherapeutic apparatus
label: Other Terms
content: Extractor, Electric; Patent Model, Dental; Electrotherapeutic Apparatus, Faradic Battery; Medicine
physicalDescription: label: Measurements
content: overall: 3 1/2 in x 5 5/8 in x 2 3/8 in; 8.89 cm x 14.2875 cm x 6.0325 cm