[21.] LEMMA II.

[22.] LEMMA III.

[23.] PROBLEM X.

[24.] PROBLEM XI.

[25.] PROBLEM XII .

[26.] LEMMA IV.

[27.] LEMMA V.

[28.] PROBLEM XIII.

[29.] PROBLEM XIV.

[30.] SUPPLEMENT. PROBLEM I.

[31.] PROBLEM II.

[32.] PROBLEM III.

[33.] PROBLEM IV.

[34.] PROBLEM V.

[35.] PROBLEM VI.

[36.] General Solution.

[37.] A SECOND SUPPLEMENT, BEING Monſ. DE FERMAT’S Treatiſe on Spherical Tangencies. PROBLEM I.

[38.] PROBLEM II.

[39.] PROBLEM III.

[40.] PROBLEM IV.

[41.] PROBLEM V.

[42.] PROBLEM VI.

[43.] PROBLEM VII.

[44.] LEMMA I.

[45.] LEMMA II.

[46.] LEMMA III.

[47.] LEMMA IV.

[48.] LEMMA V.

[49.] PROBLEM VIII.

[50.] PROBLEM IX.