Aristotle, Problemata by E. S. Forster, Oxford 1927. Book XV.11. 912b Why is it that during eclipses of the sun, if one views them through a sieve or a leaf—for example, that of a plane-tree or any other broad-leaved tree
or through the two hands with the fingers interlaced, the rays are crescent-shaped in the direction of the earth ?
Aristote, Problèmes. 912.b
Pour quelle raison, quand lors d’une éclipse de soleil, on regarde à travers un tamis ou le feuillage d’un arbre,
les rayons de soleil apparaissent-ils sur le sol sous forme de lunules ?