variable inductance
Datecirca 1890
Inventory Number0497
ClassificationInductance
Subject
Maker
American
Cultural Region
Place of Use
Dimensions10.4 × 14 × 7 cm (4 1/8 × 5 1/2 × 2 3/4 in.)
Material
DescriptionFrom Instrument Card: "Variable Inductance...Small solenoid mounted horizontally on wood brace with binding posts on top. An iron rod may be set in the center of the coil to vary inductance."
Signedunsigned
Inscribedmarked on bottom: B
FunctionFor the demonstration of electro-magnetism. The inductance of the coil varies depending on how deeply the iron core is inserted.
ProvenanceJefferson Lab Harvard University Physics Department.
Historical AttributesThe white (blue) triangle indicates that it was used for teaching at the Physics Department, Harvard University. Course Physics 3.
Wireless Specialty Apparatus Company
Date: circa 1908
Accessories: copper-plated glass cylinders (0507b and 0507c)
Object number: 0507a
Department of Physics, Harvard University
Date: circa 1895
Accessories: goes together with coil # 0494
Object number: 0493
Radiation Laboratory of the Massachusetts Institute of Technology
Date: circa 1915
Object number: 0480
Robert W. Paul Instrument Company
Date: 1890-1920
Object number: 0296a,b
