[81.] PROP. XIII. THEOREMA.

[82.] PROP. XIV. THEOREMA.

[83.] PROP. XV. THEOREMA.

[84.] PROP. XVI. THEOREMA.

[85.] PROP. XVII. THEOREMA.

[86.] PROP. XVIII. THEOREMA.

[87.] PROP. XIX. THEOREMA.

[88.] CONSECTARIUM.

[89.] PROP. XX. THEOREMA.

[90.] PROP. XXI. THEOREMA.

[91.] PROP. XXII. THEOREMA.

[92.] SCHOLIUM.

[93.] PROP. XXIII. THEOREMA.

[94.] PROP. XXIV. THEOREMA.

[95.] PROP. XXV. THEOREMA.

[96.] PROP. XXVI. THEOREMA.

[97.] PROP. XXVII. THEOREMA.

[98.] PROP. XXVIII. THEOREMA.

[99.] PROP. XXIX. PROBLEMA. Dato circulo æquale invenire quadratum.

[100.] PROP. XXX. PROBLEMA. Ex dato ſinu invenire arcum.

[101.] PROP. XXXI. PROBLEMA. Ex dato arcu invenire ſinum.

[102.] PROP. XXXII. PROBLEMA. Invenire quadratum æquale ſpatio hyperbolico con-tento à curva hyperbolica, uno aſymptoto & dua-bus rectis alteri aſymptoto parallelis; quod ſpatium æquale eſt ſectori hyperbolico cujus baſis eſt eadem curva.

[103.] PROP. XXXIII. PROBLEMA. Propoſiti cujuscunque numeri logorithmum invenire.

[104.] SCHOLIUM.

[105.] PROP. XXXIV. PROBLEMA. Ex dato logorithmo invenire ejus numerum.

[106.] Tom. II. Mmm

[107.] PROP. XXXV. PROBLEMA. Rectâ per datum punctum in diametro ductâ, ſemicirculum in ratione data dividere.

[108.] SCHOLIUM.

[109.] FINIS.

[110.] II. HUGENII OBSERVATIONES IN LIBRUM JACOBI GREGORII, DE VERA CIRCULI ET HYPERBOLÆ QUADRATURA.