[8] Aph. 39.

[9] Aph. 41.

[10] Aph. 10, 24.

[11] Aph. 45.

[12] De Cartes Princ. Phil. Part. 3. §. 52.

[13] Fermat, in Oper. pag. 156, &c.

[14] Nov. Org. Aph. 46.

[15] Aph. 50.

[16] Ibid.

[17] Aph 53.