13. What pieces are best adapted for ricochet fire?
Those which throw heavy shells, for, if used to enfilade a work, the shells lodge and explode in the traverses, and render the guns more liable to be dismounted, and their detachments put hors de combat.
14. What determines the nature of the ricochet?
The angle of fall: it is flattened when this angle does not exceed 6°, and curvated when it is between 10° and 12°. In the first of these fires, the velocities are great, and in the second small.
15. What are the charges for a flattened ricochet for siege guns at an angle of about 3°?
16. What are the charges for a flattened ricochet for siege howitzers at an angle of about 3°?
17. What are the charges for a curvated ricochet for a siege howitzer at an angle of about 10°?