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Johnson, Manuel John, 1805 - 1859 (astronomer)

 Person

Found in 1 Collection or Record:

 File

Papers on magnetism and photography, 1855 - 1861

Reference Code: GBR/0180/RGO 6/678
Scope and Contents Correspondence and papers concerning instructions, magnetic instruments and photographic techniques. The papers include J. Glaisher's report to the Astronomer Royal on examining the magnetic instruments at the Greenwich Observatory; adjustments to vertical force magnets and compasses; sketches of new mountings for dipping needles; discrepancies of dip; alterations of instruments; trials of dipping needles; papers by J.V. Lamont on the form of magnets (one in English, one in German) and...
Dates: 1855 - 1861
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  • Subject: Photography X

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