[41.] COROLLARIVM.

[42.] SCHOLIVM.

[43.] THEOREMA 9. PROPOSITIO 11.

[44.] SCHOLIVM.

[45.] COROLLARIVM PRIMVM.

[46.] COROLLARIVM II.

[47.] THEOREMA 10. PROPOSITIO 12.

[48.] COROLLARIVM.

[49.] THEOREMA 11. PROPOSITIO 13.

[50.] THEOREMA 12. PROPOSITIO 14.

[51.] SCHOLIVM.

[52.] THEOREMA 13. PROPOSITIO 15.

[53.] LEMMA.

[54.] COROLLARIVM.

[55.] THEOREMA 14. PROPOSITIO 16.

[56.] COROLLARIVM.

[57.] THEOREMA 15. PROPOSITIO 17.

[58.] LEMMA.

[59.] SCHOLIVM.

[60.] THEOREMA 16. PROPOSITIO 18.

[61.] THEOREMA 17. PROPOSITIO 19.

[62.] SCHOLIVM.

[63.] THEOREMA 18. PROPOSITIO 20.

[64.] SCHOLIVM.

[65.] Linea horæ 24. ab ortu vel occaſu. Vel horizontalis linea.

[66.] Linea horæ 12. ab ortu vel occaſu.

[67.] Linea horæ ſextæ à meridie vel media nocte.

[68.] Linea horæ 12. à meridie vel media nocte.

[69.] Linea horæ 23. ab ortu vel occaſu.

[70.] Linea horæ 22. ab ortu vel occaſu.