resistance box
Datecirca 1920
Inventory Number1997-1-0190
ClassificationResistance Box
Subject
Maker
Leeds & Northrup Company
1903 - 1995
Cultural Region
Place of Origin
Dimensions16 × 36.7 × 13.8 cm (6 5/16 × 14 7/16 × 5 7/16 in.)
Material
DescriptionLong rectangular resistance box with twelve terminals arranged in two rows of six each. These are marked with resistances increasing from 1000 to 20,000 ohms (1000, 2000, 3000, 4000, 10,000 and 20,000). The binding posts are mounted on a hard rubber panel, over a rectangular wooden box. Six large screws attach the rubber panel to the wooden box.
Signedon top panel: LEEDS & NORTHRUP CO. / PHILADELPHIA / 85833 / MADE IN U.S.A.
Inscribedin paint: Reserve / Chem-40
[Attached tag has physical description, maker's name.]
FunctionSuch an instrument is used to measure the resistance of electric conductors. For a short general description and other images, go to the following website.
ProvenanceFrom the Department of Chemistry, Harvard University.
Leeds & Northrup Company
Date: 1910-1930
Accessories: plugs (12)
Object number: 1997-1-0186
Leeds & Northrup Company
Date: 1910-1930
Accessories: plugs (12)
Object number: 1997-1-0185
