[171.] Experimentum 4.

[172.] Experimentum 5.

[173.] Experimentum 6.

[174.] Experimentum 7.

[175.] Experimentum 8.

[176.] Experimentum 9.

[177.] Experimentum. 10.

[178.] Experimentum II.

[179.] Experimentum 12

[180.] Experimentum 13.

[181.] SCHOLIUM 1. Generalia de viribus centralibus.

[182.] SCHOLIUM 2. De Motu in Circulo.

[183.] SHOLIUM 3. De Motu in Ellipſi.

[184.] SCHOLIUM 4. De Motu in orbitâ agitatâ

[185.] SCHOLIUM 5. De Motu in Ellipſi agitatâ.

[186.] SCHOLIUM. 6 De Computatione motuum Apſidum in curvis parum cum circulo differentibus.

[187.] LIBRI I. PARS IV. De Viribus inſitis, & Colliſione corporum. CAPUT XXII. De Viribus corporibus motis inſitis.

[188.] Machina. Qua corporum motorum vires conferuntur.

[189.] Experimenta i2

[190.] Experimenta 2R.

[191.] Experimentum 3.

[192.] CAPUT XXIII. De Colliſione corporum. Definitio I.

[193.] Definitio 2.

[194.] Definitio 3.

[195.] Machina Qua experimenta circa colliſiones corporum inſtituuntur.

[196.] Machina Alia, cujus ope eadem Experimenta circa colliſio-nes inſtituuntur.

[197.] Experimentumi.

[198.] Experimentum 2.

[199.] Experimentum 3.

[200.] Experimentum 4.