Images(4)

magnetometer

Datecirca 1908

Inventory Number0161a,b,c

ClassificationMagnetometer

Subject

Maker American ?

User Department of Physics, Harvard University founded 1884

Cultural Region

Place of Use

Dimensions49.4 × 35.3 × 21.7 cm (19 7/16 × 13 7/8 × 8 9/16 in.)

Material

DescriptionSuspended U-shaped magnet with mirror within a heavy cylinder of brass. Cylindrical brass case with viewing mirror near bottom. Probably had a horizontal scale attached at the level of the magnet. Horizontal scale missing.

Signedunsigned

Curatorial RemarksIdentical to 0162a-c. . suspended u-shaped magnet with mirror within a heavy cylinder of brass. Cylindrical brass case with viewing mirror near bottom. Probably had a horizontal scale attached at the level of the magnet. Identical to 162a-c. HOrizontal scale missing reference: Gurley, W. and L.E. [Catalogue of] Electrical Apparatus (Troy, NY, 1908) pp 24-25 see Central Scientific Co.: J-141 1941 p 1206; J 300 1964 p 684 for the experimental determination of M/H by the method of Gauss. A meter stick should be attached to two of the four support rods and a bar magnet provided (65 mm long, 6 mm sq)

FunctionFor the experimental determination of M/H (magnetic fields) by the method of Gauss. A meter stick should be attached to two of the (4) support rods and a bar magnet provided (65mm long , 6 mm square).
The angle of declination would be determined by watching the reflection of the scale on the mirror with a scope.

ProvenanceFrom Harvard University physics department.