File:Folios 56v-57r of BNE ms. 8918.jpg

Summary
Biblioteca Nacional de España ms. 8918, folios 56v–57r, from the Summa de astronomia of Pedro Gallego (d. 1267).

Parchment manuscript from before 1400.

http://bdh.bne.es/bnesearch/detalle/bdh0000077592