[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.

[521.] Experimentum 3.

[522.] Experimentum 4.

[523.] CAPUT XIII. De Reflexione Luminis.

[524.] Definitio 1.

[525.] Definitio 2.

[526.] Experimentum 1.

[527.] Experimentum. 2.

[528.] Experimentum 3.

[529.] Experimentum 4.

[530.] CAPUT XIV. De Speculis planis.