TABLE.

and of their defects. 17
Chap. 14. On the quality of modern Artillery castings. 20
Chap. 15. On the quality and character of Artillery pieces, and of the defects that are found in them, caused by the inadvertence of the founders. 22
Chap. 16. On the division and distinction of the types of Artillery, and of the diverse effects for which each of them were discovered, and of how much importance it is to know how to make this division. 26
Chap. 17. Of the types or species of Artillery, and which pieces are contained in each of them. 33
Chap. 18. On the formation and proportion of the pieces of the first type of Artillery, and of the many considerations that must be had regarding their effects. 34
Chap. 19. Of different opinions that exist among Gunners concerning the charging of the pieces of this first type with reason, with other things pertaining to this matter of great utility and importance. 36
Chap. 20. Of various accidents occurring regarding the formation of the pieces of the first type of Artillery, and of the defects of firing caused by their disproportionate length. 38
Chap. 21. Of the reasons or causes for which the pieces of Artillery that have too long a barrel and too wide a mouth fire much less than those that have a mediocre and proportionate length. 41

OF THE SECOND TREATISE.

CAP. I. On the due thickness of metal that the pieces of this first type must have, and it declares to which operation the practical Gunners apply the term tertiare to examine the thickness/bore of a piece a piece. 44
Chap. 2. On the demonstration of the following way to tertiare the pieces of the first Type, and on the knowledge of the center, circle or circumference, and of its diameter. 48
Chap. 3. Of another new way to tertiare the aforementioned pieces of this