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-head449" xml:space="preserve" style="it">34. Si recta linea nec uertici ſpeculi conici conuexi obliquè incidat, nec latitudini ei{us} ſit paral
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lela: imaginem uariæ obliquitatis prouario ſit u uiſui offeret. 57 p 7.</head>
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<s xml:id="echoid-s14986" xml:space="preserve">DE lineis uerò obliquis exiſtentibus inter hos duos modos, quę appropinquant in ſuo motu
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lineis extenſis in longitudine pyramidis, habent formas parũ conuexas:</s>