[31.] Demonstration.
[32.] Corollaire I.
[33.] Corollaire II.
[34.] Corollaire III.
[35.] Corollaire IV.
[36.] Crollaire V.
[37.] Corollaire VI.
[38.] Corollaire VII.
[39.] Corollaire VIII.
[40.] Corollaire IX.
[41.] Corollaire X.
[42.] Corollaire XI.
[43.] Corollaire XII.
[44.] Corollaire XIII.
[45.] Corollaire XIV.
[46.] Corollaire XV.
[47.] Corollaire XVI.
[48.] Corollaire XVII.
[49.] Corollaire XVIII.
[50.] Corollaire XIX.
[51.] Remarque.
[52.] PROBLEME.
[53.] Solution.
[54.] Demonstration
[55.] PROPOSITION FONDAMENTALE DES POULIES,
[56.] Demonstration.
[57.] Corollaire I.
[58.] Corollaire II.
[59.] Corollaire III.
[60.] Corollaire IV.