[491.] CAPUT VIII. De refractione luminis, poſitis mediis ſuperficie ſphæricâ ſeparatis.
[492.] Experimentum 1.
[493.] Experimentum 2.
[494.] Experimentum 3.
[495.] Experimentum 4.
[496.] Experimentum 5.
[497.] Experimentum 6.
[498.] Experimentum. 7.
[499.] Experimentum 8.
[500.] Experimentum 9.
[501.] CAPUT IX. De Motu Luminis trans Medium denſius. Vbi de Lentium affectionibus.
[502.] Definitio i.
[503.] Definitio 2.
[504.] Experimentum i.
[505.] Experimentum 2.
[506.] Experimentum 3.
[507.] Experimentum 4.
[508.] CAPUT X. De Viſu, ubi de Oculi conſtructione.
[509.] Definitio.
[510.] Experimentum i.
[511.] Experimentum 2.
[512.] Experimentum 3.
[513.] CAPUT XI. De viſione trans vitra, & corrigendis quibuſdam oculorum vitiis.
[514.] De Microſcopiis & Teleſcopiis.
[515.] Definitio 1.
[516.] Definitio 2.
[517.] Experimentum 1.
[518.] Experimentum 2.
[519.] Definitio 3. & 4.
[520.] Definitio 3.