[91.] PROPOSITIO III.
[92.] PROPOSITIO IV.
[93.] PROPOSITIO V.
[94.] PROPOSITIO VI.
[95.] DEFINITIO XIV.
[96.] DEFINITIO XV.
[97.] PROPOSITIO VII.
[98.] PROPOSITIO VIII.
[99.] PROPOSITIO IX.
[100.] PROPOSITIO X.
[101.] PROPOSITIO XI.
[102.] PROPOSITIO XII.
[103.] PROPOSITIO XIII.
[104.] PROPOSITIO XIV.
[105.] PROPOSITIO XV.
[106.] PROPOSITIO XVI.
[107.] PROPOSITIO XVII.
[108.] PROPOSITIO XVIII.
[109.] PROPOSITIO XIX.
[110.] PROPOSITIO XX.
[111.] PROPOSITIO XXI.
[112.] Centrum oſcillationis Circuli.
[113.] Centrum oſcillationis Rectanguli.
[114.] Centrum oſcillationis Trianguli iſoſcelis.
[115.] Centrum oſcillationis Parabolæ.
[116.] Centrum oſcillationis Sectoris circuli.
[117.] Centrum oſcillationis Circuli, aliter quam ſupra.
[118.] Centrum oſcillationis Peripheriæ circuli.
[119.] Centrum oſcillationis Polygonorum ordinatorum.
[120.] Loci plani & ſolidi uſus in hac Theoria.