Post by Pat Ballew

1584 Jacob Christmann appointed professor of Hebrew at Heidelberg. In 1595 he defended the view that the circle could only be approximately squared. *VFR A De revolutionibus manuscript of Nicolaus Copernicus passed via Rheticus to others and was marked on 19 December 1603 by Christmann with Nicolai Copernick Canonici Varmiensis in Borussia Germaniae mathematici … ("of Canon Nicolaus Copernick from Warmia in Prussia of Germany, of the mathematician …"). Since 1953 it is located in Kraków in the Jagiellonian library (Signatur: Ms. BJ. 10 000) and is accessible online. *Wik Note by Christmann in the De revolutionibus manuscript, 1603