*Trajectory*--curved path taken by a projectile in its flight through the air.
*Transom*--horizontal beam between the cheeks of a gun carriage.
*Traverse carriage*--as used here, a stationary gun mount, consisting of a gun carriage on a wheeled platform which can be moved about a pivot for aiming the gun to right or left.
*Windage*--as used here, the difference between the diameter of the shot and the diameter of the bore.
[Illustration: Figure 51--THE PARTS OF A CANNON.]
The following is a listing of the more important sources dealing with the development of artillery which have been consulted in the production of this booklet. None of the German or Italian sources have been included, since practically no German or Italian guns were used in this country.
*SPANISH ORDNANCE.* Luis Collado, "Platica Manual de la Artillería" ms., Milan 1592, and Diego Ufano, _Artillerie_, n. p., 1621, have detailed information on sixteenth century guns, and Tomás de Morla, _Láminas pertenecientes al Tratado de Artillería_, Madrid, 1803, illustrates eighteenth century material. Thor Borresen, "Spanish Guns and Carriages, 1686-1800" ms., Yorktown, 1938, summarizes eighteenth century changes in Spanish and French artillery. Information on colonial use of cannon can be found in mss. of the Archivo General de Indias as follows: Inventories of Castillo de San Marcos armament in 1683 (58-2-2,32/2), 1706 (58-1-27,89/2), 1740 (58-1-32), 1763 (86-7-11,19), Zuñiga's report on the 1702 siege of St. Augustine (58-2-8,B3), and Arredondo's "Plan de la Ciudad de Sn. Agustín de la Florida" (87-1-1/2, ms. map); and other works, including [Andres Gonzales de Barcía,] _Ensayo Cronológico para la Historia General de la Florida_, Madrid, 1723; J. T. Connor, editor, _Colonial Records of Spanish Florida_, Deland, 1930, Vol. II., Manuel de Montiano, _Letters of Montiano_ (Collections of the Georgia Historical Society, v. VII, pt. I), Savannah 1909; Albert Manucy, "Ordnance used at Castillo de San Marcos, 1672-1834," St. Augustine, 1939.
*ENGLISH ORDNANCE.* For detailed information John Müller, _Treatise of Artillery_, London, 1756, has been the basic source for eighteenth century material. William Bourne, _The Arte of Shooting in Great Ordnance_, London, 1587, discusses sixteenth century artillery; and the anonymous _New Method of Fortification_, London, 1748, contains much seventeenth century information. For colonial artillery data there is John Smith, _The Generall Historie of Virginia, New-Englande, and the Summer Isles_, Richmond, 1819; [Edward Kimber] _Late Expedition to the Gates of St. Augustine_, Boston, 1935; and C. L. Mowat, _East Florida as a British Province_, 1763-1784, Los Angeles, 1939. Charles J. Foulkes, _The Gun-Founders of England_, Cambridge, 1937, discusses the construction of early cannon in England.