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Eclipse laboratory set of permanent magnets

Eclipse laboratory set of permanent magnets

1950-1980
Firle eye magnet in case

Firle eye magnet in case

Set of 'Artificial' Magnets, c. 1762

Set of 'Artificial' Magnets, c. 1762

1762
Magnet rotating on its own axis

Magnet rotating on its own axis

1822-1856
Two ferrite loudspeaker ring magnets

Two ferrite loudspeaker ring magnets

1981
Magnets rotating round a current

Magnets rotating round a current

1822-1856
Portable pivoted horse-shoe magnet type galvanometer

Portable pivoted horse-shoe magnet type galvanometer

1890
Magnets with quote by Stephen Hawking

Magnets with quote by Stephen Hawking

2012-2018
Large magnet

Large magnet

1872
Pair of collimator magnets, ex Kew Observatory

Pair of collimator magnets, ex Kew Observatory

Magnet, cuboid block, magnets on base

Magnet, cuboid block, magnets on base

1801-1900
Magnetic disc record type 3011 made by W. Assman at Bad Homburg

Magnetic disc record type 3011 made by W. Assman at Bad Homburg

1949
Four pairs of small steel magnets

Four pairs of small steel magnets

1900-1983
Horseshoe magnet 170mm long

Horseshoe magnet 170mm long

1900-1960
Magnet in case

Magnet in case

1801-1850
Bar magnets

Bar magnets

1926-1940
Selection of permanent magnets

Selection of permanent magnets

1970
Two pairs of bar magnets with keepers in fitted box

Two pairs of bar magnets with keepers in fitted box

1877-1904
Short steel bar magnet

Short steel bar magnet

1900-1980
Magnetical magazine, twelve magnets in case

Magnetical magazine, twelve magnets in case

1753
Pair of collimator magnets in wooden carier

Pair of collimator magnets in wooden carier

Pair of bar magnets

Pair of bar magnets

Two picture shift magnets

Two picture shift magnets

1963
Two picture correction magnets

Two picture correction magnets

1963
Collection of six ball-ended magnets

Collection of six ball-ended magnets

1900-1983
Pair of bar magnets

Pair of bar magnets

Pair of magnetic floater magnets

Pair of magnetic floater magnets

1981
Short steel bar magnet

Short steel bar magnet

1900-1980
2 steel horseshoe magnets

2 steel horseshoe magnets

1890-1910
Magnet, metal, U-shaped, European, 19th century

Magnet, metal, U-shaped, European, 19th century

1801-1900
Magnets used to legend a diagram of peg dolls

Magnets used to legend a diagram of peg dolls

1970-1975
Short steel bar magnet

Short steel bar magnet

1900-1980
Pair of bar magnets

Pair of bar magnets

Horseshoe magnet 210mm long

Horseshoe magnet 210mm long

1900-1960
Magnet to show construction

Magnet to show construction

Du Bois-Reymond's compensating magnet. It allowed the one operating a galvanometer to fine-tune its sensitivity by repositioning a permanent magnet as necessary in order to compensate wholly or partially for the Earth's magnetic pull on the galvanometer needle. The wooden guide was affixed to the center of the galvanometer and could rotate freely; the magnet, in a brass mount, could be precisely positioned at any distance from the center. A pulley and string arrangement allowed the operator to adjust the magnet on the fly while seated a distance away at the reading telescope.

Du Bois-Reymond's galvanometer-compensating magnet

1876
Russian lodestone and coil used with it by Faraday

Professor Daniell's lodestone used by Faraday in 1831

1777
Magnetic disc record type Universa 50, serial no. 24715, made by W. Assman at Bad Homburg, c. 1949

Magnetic disc record type Universa 50

1949
Fellows magneto type EM4, No.6740, sectioned

Motor car magneto

1931 design: 'four claw' cobalt steel permanent magnet, for moving coil loud speaker.

1931 design: 'four claw' cobalt steel permanent magnet

1931
1931 design 'M' shape cobalt steel permanent magnet for moving coil loud speaker

1931 design 'M' shape cobalt steel permanent magnet

1931
3% cobalt steel telephone ringer magnet

3% cobalt steel telephone ringer magnet

1930
6% tungsten steel telephone receiver magnet

6% tungsten steel telephone receiver magnet

1906
Alcomax III telephone receiver magnet

Alcomax III telephone receiver magnet

1958
Fork relay magnets for fork relay type D-14 no. 87

Fork relay magnets for fork relay type D-14 no. 87

Two bar magnets with pair of keeps in wooden box, belonging to F.W. Ogg, European, early 20th century

Two bar magnets with pair of keeps in wooden box

1901-1930
1931 design 'assembled' cobalt steel permanent magnet for moving coil loud speaker

1931 design 'assembled' cobalt steel permanent magnet

1931
35% cobalt steel telephone receiver magnet

35% cobalt steel telephone receiver magnet

1930
Alcomax II telephone receiver magnet

Alcomax II telephone receiver magnet

1948
Alnico telephone receiver magnet

Alnico telephone receiver magnet

1938