Medium sized azimuth quadrant of brass

MEDIUM SIZED AZIMUTH QUADRANT OF BRASS

Tycho Brahe, Astronomiæ instauratæ mechanica (1598), ff. 8v-9r.

Description and use of the instrument (English translation): http://www.kb.dk/en/nb/tema/webudstillinger/brahe_mechanica/brahe_fsi.ht...