f. Momentary unserviceability of guns.
g. Expedients for repairing a disabled carriage.
9. Artillery practice.
a. Exposition of the theory of firing (as far as it can be elucidated by a knowledge of the elements of mathematics;) general notions concerning the curve of round and hollow shot, and the influence of the force of powder, of gravity, and of the air’s resistance upon their velocity; the curve after the first graze; trajectory of grape shot.
b. Classification and denomination of the various methods of firing or throwing projectiles.
c. Range; conditions on which it depends; its practical limits.
d. Effect of projectiles.
α. Probable accuracy of practice; circumstances on which it depends.
β. Force of the blow; circumstances on which it depends.
e. Recoil, jumping, or bouncing; explanation of such occurrences.