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| Chap. 14. On the sixth, and last difference of the Cannons of this second type, which are the double Cannons. | 102 |
| Chap. 15. On the Spoons that must serve for loading the pieces of this second type. | 103 |
| Chap. 16. On the form, and style that the wheels of the pieces of this second type must have, so that they are well proportioned. | 105 |
| Chap. 17. On the length, width, and thickness of the Axles of the carriages of these pieces of the second type. | 106 |
| Chap. 18. On the pieces of the third type, which are the Mortar Cannons Petrieri stone-throwing cannons. | 106 |
| Chap. 19. On the method of tertiare the Cannons of this third type, for the purpose of knowing if they have the required thicknesses of metal. | 107 |
| Chap. 20. On the Spoons that must serve for the use of these Mortar Cannons. | 109 |
| Chap. 21. On Mortars, or Trabucchi siege engines/mortars, and on their formation, and effects. | 110 |
| Chap. 22. On a discourse regarding the common thicknesses of all Artillery pieces. | 111 |
| Chap. 23. On the pieces that are commonly called bastards, and which are those to whom this name properly belongs. | 112 |
| Chap. 24. On the proportion that Stone Balls bear to those of iron, and those of iron to those of Stone, and Lead. | 113 |
| Chap. 25. On the elevations of Artillery pieces, and on the method of knowing how to use the points and minutes of the Square. | 114 |
| Chap. 26. On a Discourse made by the Author regarding the previous reasoning against the opinion of a certain modern Author. | 117 |
| Chap. 27. On the correct formation of the Square made to give elevation to Artillery pieces. | 120 |
| Chap. 28. On the Aim, or pointing of Artillery pieces; an operation truly of maximum importance among experienced Gunners. | 122 |
| Chap. 29. Where the method of finding the aforementioned Aim is taught, and a very beautiful, artificial way of sharing it. | 124 |
| Chap. 30. In which, with two evident demonstrations, the difference that exists between the shot called "of the line," or level of the bore of a piece, to that of the level of its sights is manifested. | 125 |