resistance box
Datecirca 1920
Inventory Number0447
ClassificationResistance Box
Subject
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Place of Use
Dimensions20.3 × 28 × 13.8 cm (8 × 11 × 5 7/16 in.)
Material
DescriptionTen spools of resistance wire are fixed underneath a hard rubber panel. On top of the panel are three tall binding posts, the tops of which are made of brass screws. This ensemble is mounted on a wooden box sitting on a rectangular wooden base.
Probably lab-made, for the Harvard University "Physics 3" lab, engraved in serveral places on the instrument.
Probably lab-made, for the Harvard University "Physics 3" lab, engraved in serveral places on the instrument.
Signedunsigned
Inscribedengraved on several locations: Physics 3
Curatorial RemarksWas first incorreclty catalogued as 1997-1-0117, so slide will show that number.
FunctionSuch an instrument is used to control the resistance of electric conductors. For a short general description and other images, go to the following website.
There is a blue triangle painted on the box, meaning that this instrument was used in the physics department for didactic purposes.
There is a blue triangle painted on the box, meaning that this instrument was used in the physics department for didactic purposes.
ProvenanceFrom the Department of Physics, Jefferson Laboratory, Harvard University.
Leeds & Northrup Company
Date: 1910-1930
Accessories: plugs (5)
Object number: 2003-1-0035