Small quadrant of gilt brass
Commentary
Small quadrant of gilt brass
SMALL QUADRANT OF GILT BRASS
Tycho Brahe, Astronomiæ instauratæ mechanica (1598), ff. 7v-8r.
Description and use of the instrument (English translation): http://www.kb.dk/en/nb/tema/webudstillinger/brahe_mechanica/brahe_fsi.ht...