Georg Hartmann

Georg Hartmann (sometimes spelled Hartman; February 9, 1489 – April 9, 1564) was a German engineer, instrument maker, author, printer, humanist, priest, and astronomer.

With this discovery he attempted to find the mathematical reason why this was the case, but his solution to this phenomenon was eventually found to be flawed.

This letter was not public knowledge until almost three centuries later in 1831 when it was finally printed, and as such his work with magnetism was not able to be studied or influenced others in this era.

He also left Collectanea mathematica praeprimis gnomonicam spectania, 151 f. MS Vienna, Österreichische Nationalbibliothek, Quarto, Saec.

16 (1527–1528), an unpublished work on sundials and astrolabes that was translated by John Lamprey and published under the title of Hartmann's Practika in 2002.

[13] In Germany, Hartmann's instruments can be seen on display at the Germanisches Nationalmuseum in Nuremberg, Kunstgewerbemuseum in Berlin, Museum fur Angewandte Kunst in Cologne, Staatlicher Mathematischer-Physikalischer Salon in Dresden, and the Kestner-Museum in Hannover.

[13] Some of Hartmann's astrolabes can be seen on display in France at the Bibliothèque Nationale in Paris and the Musee National de la Renaissance in Ecouen.