To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman.
Object identifier:
graphics:5753
Order this image
View Details
You may order a high-resolution, digital copy of this image.
Following the "Place Order" link below will take you to our Aeon request management system. If you have not used this system, you will be prompted to create a new account. You will need this account to process your order.
Indigenous community members may order copies for free. To do this, please contact [email protected].
You may download or print a low-resolution copy of this image here
Please note that ordering or acquiring an image does not confer permission to publish. Permission must be requested separately and use fees may apply.
For details, please visit our
Rights and Reproductions page
.
Description
View Metadata| TITLE INFORMATION | |||
| Title | To George Washington president of the United States of America this magnetic atlas or variation chart is humbly inscribed by John Churchman. | ||
| IDENTIFIERS | |||
| Legacy Identifier | APSdigobj3477 | ||
| CONTENT DESCRIPTION | |||
| Note | 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. | ||
| Language | English | ||
| Subject (lcsh) | Maps | ||
| Subject (lcsh) | Magnetic Atlas | ||
| PHYSICAL DESCRIPTION | |||
| Type | StillImage | ||
| Genre | Maps | ||
| Digital Origin | reformatted digital | ||
| Reformatting Quality | preservation | ||
| ORIGIN INFORMATION | |||
| Date Issued | 1790 | ||
| Publisher | Philadelphia: James Johnson: 1790 | ||
| PARENT COLLECTION | |||
| Title | APS.Printed.Maps | ||
| ACCESS INFORMATION | |||
| Use | 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 | ||