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Apparatus to illustrate the phenomena of terrestrial magnetism

Small frame containing two kinds of spider's thread

Welsh's vertical force magnetograph by Adie, 1857

1857

Pair of 6-inch magnets and keepers, in mahogany box

Two inertia rings, circa 1853

1853

Thirteen inertia bars

Unifilar variation compass and magnetometer by Robinson

1830

Compass with prismatic azimuth attachment

1801-1900

Two inertia rings

Three inertia bars

Variometer reflecting head in fitted case

Inertia ring used by Capt. Collinson, 1850-53

1850-1853

Two Fox dip needles in carriers and ivory rubber

1851-1900

Fox dip and intensity apparatus by George

circa 1840

Kew pattern unifilar magnetometer, incomplete

Dip circle by Robinson, c 1830.

1830

Pair of collimator magnets in wooden carier

Kew pattern unifilar magnetometer

1883

Kew pattern unifilar magnetometer

Azimuth compass in gimbals

Variation compass

Inertia bar for use with unifilar magnetometer

Compass for deviation tests, circa 1850

1850

Sixteen inertia rings

Porter's magnetic sundial

Gunmetal scale

1883

Vertical magnetometer by Oertling, c. 1930

1930

Dip needle

Six inertia bars

Inertia ring

Magnet bar

Pair of 12-inch magnets and keepers, in box

Dip-needle, demonstration model

Three photographic plates and one plate carrier

1850

Kelvin's Vertical Force Magnetometer, by James White, 1870-1900

1870-1900

Two dip needles used by Sir J.C. Ross, c.1840

1840

Dip circle by Robinson, c. 1830

1830

Dip circle and magnetometer by Brunner

1884

Cabinet of magnetic apparatus

1801-1850

Dip circle by Robinson, c.1830

1830

Dip circle by Robinson & Barrow, London, c.1840

1842-1845

Dip circle by Nairne and Blunt

1775

Pair of collimator magnets, ex Kew Observatory

Magnetic model showing changes at Philadephia

Variation compass, for observations of the Aurora, 19th century

1801-1900

Variation Compass and magnetometer, 1837-1843

1837-1843

Variation compass by Adams, c.1750

Variation compass by Adams, c.1750

1750

Register of magnetic disturbance at Toronto 30th Nov. 1849 and description of magnetometers. (Originally in frame but this no longer seems to exist).

Register of magnetic disturbance at Toronto 30th Nov. 1849 and description of magnetometers

Map of magnetic variation, 1880

Map of magnetic variation, 1880

1880

Map of magnetic declination, 1880

Map of magnetic declination, 1880

1880