Galvanometer

Physics

Accession Number: 2009.ph.202

Description:

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.”

Alternative Name:

Primary Materials: Wood, Metal, Glass

Markings:

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.”

Dimensions (cm):

Height = 13 cm, Length = 21 cm, Width = 13.5 cm

Function:

For making precision measurements of electric current.

Condition:

Associated Instruments:

Manufacturer:

Leeds and Northrup, Philadelphia, Pennsylvania, USA

Date of Manufacture: Mid twentieth century

Provenance: Collection of Dr. Martin Lee.

Historical Notes: