NOTE.--The foregoing articles on “Theory,” are principally extracted from “New Principles of Gunnery by Robins,” “Treatise on Artillery, by Lieut.-Colonel Boxer, R.A.” “The Rifle Musket, by Captain Jervis, M.P., Royal Artillery.” “Elementary Lecturers on Artillery, by Major H. C. Owen and Captain T. Dames, Royal Artillery.” THE END. [Illustration: PLATE 1. FIG. 1. Powder Mill. FIG. 2. Old Eprouvette Pendulum FIG. 3. New Pattern Eprouvette _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 2. Hydraulic Press _Enlarged section of Valve_ _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 3. Robins’ Balistic Pendulum _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 4. FIG. 1. Bow unstrung FIG. 2. Bow strung FIG. 3. Hand or Arrow Rocket FIG. 4. Five barrelled Matchlock FIG. 5. Revolving Barrelled Matchlock CHINESE EXPLOSIVE AND OTHER WEAPONS. FIG. 6. Asiatic Bow _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen] [Illustration: PLATE 5. FIG. 1. Matchlock FIG. 2. Breech loading Gingal (Chamber in) FIG. 3. Breech loading Gingal (Chamber out) CHINESE EXPLOSIVE ARMS. _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 6. FIG. 1. FIG. 2. FIG. 3. FIG. 4. _Harry Vernon dele._ MACHINES FOR THROWING DARTS AND STONES. Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 7. ONAGER (SLUNG). _Harry Vernon delt._ Day & Son, Lith^{rs}. to the Queen.] [Illustration: PLATE 8. Onager (unslung). _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 9. Balista _Arthur Walker C.^{t} 79.^{th} delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 10. Catapulta. _Dessiné par Arthur Walker._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 11. FIG. 1. Staff slings, Longbows, Crossbows and Flail. FIG. 2. Onager. FIG. 3. Trepied. _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 12. Detail of Springs. Balista. _Harry Vernon Staff Serj^{t}. del._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 13. FIG. 1. FIG. 2. FIG. 3. _Harry Vernon delt._ A Cross bow man and Slinger. Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 14. FIG. 1. FIG. 2. FIG. 3. FIG. 4. Cross-bows and Quarrels. _Harry Vernon delt._ Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 15. _Harry Vernon delt._ A Cross bow man and his Paviser. Day & Son Lith^{rs}. to the Queen.] [Illustration: PLATE 16. FIG. 1. Gun and Querrel Temp: Edward 3^{rd}. Sloane M^{ss}. FIG. 2. Small chambered Cannon from the Santini M^{ss}. FIG. 3. Santini M^{ss}. Early part of 15^{th} Cent^{y}. FIG. 4. Mode of mounting from Froissart. FIG. 5. Method of obtaining elevation. FIG. 6. Mode of Mounting from Valturius. FIG. 7. From the wreck of the “Mary Rose” Temp: Henry 8^{th}. FIG. 8.