[51.] COMMENTARIVS.

[52.] COMMENTARIVS.

[53.] COMMENTARIVS,

[54.] DENVMERO ORBIVM CAELESTIVM.

[55.] DE MOTIBVS ORBIVM CÆLESTIVM.

[56.] DEPERIODIS MOTVVM CÆLESTIVM.

[57.] QVOMODO DEPREHENSVM SIT OMNES cælos ſimpliciter ab ortu in occaſum moueri.

[58.] QVA RATIONE COLLECTVS SIT MOTVS Cælorum ab occaſu in ortum.

[59.] QVA INDVSTRIA CAELOS INFERIORES ab Occaſu in Ortum ſuper diuerſos polos à polis mundi moueri obſeruatum ſit.

[60.] PROPTER QV AE PHAENOMENA ASTROMI motum trepidationis ſtellis fixis attribuerint.

[61.] DE ORDINE SPÆRARVM CÆLESTIVM.

[62.] COELVM MOVERI AB ORTV IN OCCASVM.

[63.] COMMENTARIVS.

[64.] COMMENTARIVS.

[65.] COELVM ESSE FIGVRÆ SPHÆRICÆ.

[66.] COMMENT ARIVS,

[67.] COMMENTARIVS.

[68.] DE FIGVRIS ISOPERIMETRIS. DEFINITIONES. I.

[69.] II.

[70.] III.

[71.] IIII.

[72.] V.

[73.] THEOR. 1. PROPOS. 1.

[74.] THEOR. 2. PROPOS. 2.

[75.] THEOR. 3. PROPOS. 3.

[76.] THEOR. 4. PROPOS. 4.

[77.] THEOR. 5. PROPOS. 5.

[78.] THEOR. 6. PROPOS. 6.

[79.] THEOR. 1. PROPOS. 7.

[80.] SCHOLIVM.