1911 Encyclopædia Britannica/Aguillon, François D'

AGUILLON (Aguilonius), FRANÇOIS D’ (1566–1617), Flemish mathematician. Having entered the Society of Jesus in 1586, he was successively professor of philosophy at Douai and rector of the Jesuit College at Antwerp. He wrote a treatise on optics in six books (Antwerp, 1613), notable for containing the principles of stereographic projection.