[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.
[61.] Corollaire V.
[62.] Corollaire VI.
[63.] Corollaire VII.
[64.] Corollaire VIII.
[65.] Corollaire IX.
[66.] Corollaire X.
[67.] Corollaire XI.
[68.] Corollaire XII.
[69.] Corollaire XIII.
[70.] Corollaire XIV.
[71.] Corollaire XV.
[72.] Corollaire XVI.
[73.] Corollaire XVII.
[74.] PROBLEME.
[75.] Solution
[76.] Demonstration.
[77.] Demonstration.
[78.] Corollaire.
[79.] Remarque.
[80.] PROPOSITION FONDAMENTALE DES POIDS SOUTENUS