[81.] Experimentum 5.
[82.] Experimentum 6.
[83.] Definitio 7.
[84.] Experimentum 7.
[85.] Experimentum 8.
[86.] Experimentum 9.
[87.] Experimentum 10.
[88.] Experimentum 11.
[89.] Experimentum 13.
[90.] SCHOLIUM De centro Gravitatis.
[91.] De Centri gravitatis inveſtigatione.
[92.] SCHOLIUM 2. Arithmetica Mechanica.
[93.] CAPUT X. De Vecte, Machinarum ſimplicium prima. Definitio 1.
[94.] Experimentum 1. 2. & 3.
[95.] Experimentum 4.
[96.] Experimentum 5.
[97.] Experimentum 6.
[98.] Experimentum 7. & 8.
[99.] Experimentum 9
[100.] CAPUT XI.
[101.] Definitio
[102.] Experimentum 1.
[103.] Experimentum 2.
[104.] CAPUT XII. De Trochlea, Machinarum ſimplicium tertia.
[105.] Experimentum 1.
[106.] Experimentum 2.
[107.] Experimentum 3. & 4
[108.] Experimentum 5.
[109.] CAPUT XIII. De Cuneo & Cocbleâ, Machinarum Simplicium quartâ, & quintâ.
[110.] Definitio I.