Abbatis Francisci Maurolyci Messanensis Photismi de Lumine,
& umbra ad perspectivam, & radiorum indicentiam facientes, Neapoli, 1611

Theorema XXII

α      ©
Joseph Priestley,
The history and present state of discoveries relating to vision, light, and colours,
London 1772.


Period II
Maurolycus also hit upon the true solution of the problem concerning the image of the sun appearing round, though the rays that form it are transmitted into a dark room through an angular aperture.
The forms
of radiant bodies
when projected
through an aperture
upon a plane
are inverted...