Accession Number: 2009.ph.202
A wooden box with a hinged lid. On the side of the wooden box there is a 13 cm by 3 cm bakelite plaque with 4 terminals. The two left-most terminals are marked with “6 VOLTS” and the two right-most terminals are marked with “GA”. On the front of the wooden box there is a viewing window with a scale from 20-0-20, with a corresponding handwritten scale 0-50. Inside the wooden box there is a light source, lens, magnet and a mirror marked with “LEEDS & NORTHRUP CO., PHILADELPHIA”, and “CAT. NO. & COIL RES.”
Primary Materials: Wood, Metal, Glass
Old inventory number = phy354. On top of the lid there is a label “LEEDS & NORTHRUP CO.”, “PHILADELPHIA PENNSYLVANIA”, “MADE IN U.S.A.”, “CAT. NO. 2420C”, and “SERIAL NO. 616616”. Inside the wooden box there is a mirror marked with “LEEDS & NORTHRUP CO., PHILADELPHIA”, and “CAT. NO. & COIL RES.”
Height = 13 cm, Length = 21 cm, Width = 13.5 cm
For making precision measurements of electric current.
Leeds and Northrup, Philadelphia, Pennsylvania, USA
Date of Manufacture: Mid twentieth century
Provenance: Collection of Dr. Martin Lee.