[81.] THEOR. 7. PROPOS. 8.

[82.] THEOR. 8. PROPOS. 9.

[83.] PROBL. 2. PROPOS. 10.

[84.] THEOR. 9. PROPOS. 11.

[85.] THEOR. 10. PROPOS. 52

[86.] SCHOLIVM.

[87.] THEOR. 11. PROPOS. 13.

[88.] COROLLARIVM.

[89.] THEOR. 12. PROPOS. 14.

[90.] THEOR. 13. PROPOS. 15.

[91.] THEOR. 14. PROPOS. 16.

[92.] THEOR. 15. PROPOS. 17.

[93.] THEOR. 16. PROPOS. 18.

[94.] COMMENTARIVS.

[95.] COMMENTARIVS.

[96.] COMMENTARIVS.

[97.] TERRAM, ET AQVAM ESSE ROTVNDAS.

[98.] COMMENTARIVS.

[99.] COMMENTARIVS.

[100.] COMMENTARIVS.

[101.] COMMENTARIVS.

[102.] COMMENTARIVS.

[103.] AN EX TERRA, ET AQVA VNVS FIAT GLO-bus, hoc eſt, an horum elementorum conuexæ ſuperficies idem habeant centrum.

[104.] TERRAM ESSE CENTRVM MVNDI.

[105.] COMMENTARIVS.

[106.] COMMENTARIVS.

[107.] COMMENTARIVS.

[108.] COMMENTARIVS.

[109.] COMMENTARIVS.

[110.] Omnes ſtellæ 4. magnit. Quartæ.