[61.] LIBRI I. PARS II. De Actionibus Potentiarum. CAPUT VII. De Actionibus Potentiarum comparandis.
[62.] Definitio.
[63.] CAPUT VIII. Generalia circa Gravitatem. Phænomenon i.
[64.] Definitio. 1.
[65.] Definitio 2.
[66.] Phænomenon 2.
[67.] Phænomenon 3.
[68.] Machina
[69.] Experimentum
[70.] CAPUT IX.
[71.] Definitio 1.
[72.] Definitio 2.
[73.] Definitio 3.
[74.] Definitio 4.
[75.] Experimentum 1.
[76.] Experimentum 2.
[77.] Definitio 5.
[78.] Definitio 6.
[79.] Experimentum 3.
[80.] Experimentum 4.
[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.