To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman.
In: Pam. 538.7:C47e. John Churchman, An explanation of the magnetic atlas or variation chart. Philadelphia: James Johnson: 1790. Front. Churchman was an American who was devoted to his own theories of the variations of the magnetic needle and other things. He had presented his scheme to the Society...
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ftamphilosophsoc:oai:american-philosophical:graphics_5753 2023-05-15T17:39:54+02:00 To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. 1790 https://diglib.amphilsoc.org/islandora/object/george-washington-president-united-states-america-magnetic-atlas-or-variation-chart unknown Philadelphia: James Johnson: 1790 APS.Printed.Maps The APS has an Open Access Policy for all unrestricted material in the digital library. Open Access Materials can be used freely for non-commercial, scholarly, educational, or fair use as defined under United States copyright law. Read the full policy and learn more about our Rights and Reproduction at: http://www.amphilsoc.org/library/rights Maps Magnetic Atlas StillImage Maps 1790 ftamphilosophsoc 2022-05-28T20:11:17Z In: Pam. 538.7:C47e. John Churchman, An explanation of the magnetic atlas or variation chart. Philadelphia: James Johnson: 1790. Front. Churchman was an American who was devoted to his own theories of the variations of the magnetic needle and other things. He had presented his scheme to the Society in 1787 and was given mild encouragement. He founded his belief on the hypothesis of two bodies (besides the moon) revolving round the earth, in small circles parallel to the equator; one near the north pole, and the other was near the south pole; and the needle, being wholly governed by the attraction of these magnetic satellites, will, in whatever part of the world, always rest in the plane of the circle, passing through them and the given place. [The American Museum, Sept. 1789: p. 218]. He persevered in his work and at the 17 September 1790 meeting his "Navigation Chart, or Magnetick Atlas" was presented. It disappeared, but another copy was given by Johann Rodolph Valltravers on 19 May 1797. The Valltravers copy is the one now at the Society. Wheat: 6; Presented by the author to the Society, 17 September 1790, with a description. Another copy presented by Johann R. Valltravers, 19 May 1797. Map North Pole South pole APS Digital Library (American Philosophical Society) North Pole South Pole The Needle ENVELOPE(-64.047,-64.047,63.267,63.267) |
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APS Digital Library (American Philosophical Society) |
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unknown |
topic |
Maps Magnetic Atlas |
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Maps Magnetic Atlas To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. |
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Maps Magnetic Atlas |
description |
In: Pam. 538.7:C47e. John Churchman, An explanation of the magnetic atlas or variation chart. Philadelphia: James Johnson: 1790. Front. Churchman was an American who was devoted to his own theories of the variations of the magnetic needle and other things. He had presented his scheme to the Society in 1787 and was given mild encouragement. He founded his belief on the hypothesis of two bodies (besides the moon) revolving round the earth, in small circles parallel to the equator; one near the north pole, and the other was near the south pole; and the needle, being wholly governed by the attraction of these magnetic satellites, will, in whatever part of the world, always rest in the plane of the circle, passing through them and the given place. [The American Museum, Sept. 1789: p. 218]. He persevered in his work and at the 17 September 1790 meeting his "Navigation Chart, or Magnetick Atlas" was presented. It disappeared, but another copy was given by Johann Rodolph Valltravers on 19 May 1797. The Valltravers copy is the one now at the Society. Wheat: 6; Presented by the author to the Society, 17 September 1790, with a description. Another copy presented by Johann R. Valltravers, 19 May 1797. |
format |
Map |
title |
To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. |
title_short |
To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. |
title_full |
To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. |
title_fullStr |
To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. |
title_full_unstemmed |
To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. |
title_sort |
to george washington president of the united states of america this magnetic atlas or variation chart is humbly inscribed by john churchman. |
publisher |
Philadelphia: James Johnson: 1790 |
publishDate |
1790 |
url |
https://diglib.amphilsoc.org/islandora/object/george-washington-president-united-states-america-magnetic-atlas-or-variation-chart |
long_lat |
ENVELOPE(-64.047,-64.047,63.267,63.267) |
geographic |
North Pole South Pole The Needle |
geographic_facet |
North Pole South Pole The Needle |
genre |
North Pole South pole |
genre_facet |
North Pole South pole |
op_relation |
APS.Printed.Maps |
op_rights |
The APS has an Open Access Policy for all unrestricted material in the digital library. Open Access Materials can be used freely for non-commercial, scholarly, educational, or fair use as defined under United States copyright law. Read the full policy and learn more about our Rights and Reproduction at: http://www.amphilsoc.org/library/rights |
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1766140674315386880 |