Diagrams of eclipses, with the earth in the centre and the sun in the outer orbit. In the upper diagram, labelled 'Eclipse of the moon', the earth casts its shadow on the moon, while in the diagram below, labelled 'Eclipse of the sun', the moon casts its shadow on the earth. Image taken from ff. 11v-12 of Tractatus de sphaera (index De sphera), in a mathematical and scientific miscellany. Written in Latin.