Are to be conducted by the teacher of artillery and special engineering jointly, and are given more in detail under exercises in fortification.

III. EXERCISES IN COMMON OF THE FIRST AND SECOND CŒTUS.

A. Proof of Powder.

This exercise is to be conducted by all the students of the first and second cœtus at the time of the gun-practice, and comprises—

1. Firing different sorts of powder from the proof mortar.

2. Firing different sorts of powder purposely brought into an abnormal state.

3. Instruction in weighing and measuring the powder.

B. Artillery Practice.

All the students of the second and third cœtus take part in the practice under the inspection of the two teachers of artillery, for which fourteen days in August and September are fixed. If possible, it is to be undertaken in the morning, and only when the practice-ground is otherwise occupied is it to be deferred till the afternoons.