Ibn-al-Haitam, al-Hasan Ibn-al-Hasan; Witelo; Risner, Friedrich, Opticae thesavrvs Alhazeni Arabis libri septem, nunc primùm editi. Eivsdem liber De Crepvscvlis & Nubium ascensionibus. Item Vitellonis Thuvringopoloni Libri X. Omnes instaurati, figuris illustrati & aucti, adiectis etiam in Alhazenum commentarijs, a Federico Risnero, 1572
<head xml:id="echoid-head317" xml:space="preserve" style="it">14. Ab uno ſpeculi plani puncto, unum uiſibilis punctũ ad unũ uiſum reflectitur. 45 p 5.</head>
<head xml:id="echoid-head318" xml:space="preserve" style="it">15. In ſpeculo plano, imagouni{us} puncti, una, & uno eodeḿ in loco ab utroque uiſu uide-