Diagram
Date
1687
Creator
Unknown, Artist
Object type
Archive reference number
Manuscript page number
p4
Material
Dimensions
height (page): 179mm
width (page): 152mm
width (page): 152mm
Subject
Description
This sketched diagram appears on back of letter from Henry Justel to Edmond Halley sending a tract by Philippe de la Hire. De la Hire's paper concerned a circular magnetic needle he had created, which always respected the true meridian. The paper was read to the Royal Society on 22 June 1687, and printed in the Philosophical Transactions of the Royal Society, vol. 16, no. 188 (1687), p. 344.
Object history
At the meeting of the Royal Society on 22 June 1687, 'A printed paper of Mons. de la Hire was read, concerning a magnetical needle contrived by him in a circular form, supposing that such a circle would always respect the true meridian with the same points thereof, and the magnetical virtue change its place therein, alledging some experiments of the alteration of the poles of a magnet analogous to what is found in the globe of the earth' (Birch 4:543).
Related fellows
Edmond Halley (1656 - 1742, British) , Astronomer
Henri Justel (1620 - 1693, French) , Royal Librarian, Librarian
Henri Justel (1620 - 1693, French) , Royal Librarian, Librarian
Associated place