Paper astrolabe by Peter Jordan, Mainz, 1535

The image above dispays a paper astrolabe found in Peter Jordan’s printed edition of Johannes Stoffler’s book entitled Elucidatio fabricae ususque astrolabii, 1513. In this book, he explains the procedure for both building an astrolabe as well as using it. Since both Peter Jordan and Johannes Stoffler were german, the assumption has been made that the plate’s altitude lines correspond to the latitude of the country itself which is around 50 degrees.

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