Charge. Eprovette. Velocity. --------------------------------------------------- 16 Pr. 5 lbs. 125 1415 ” ” 8 ” 1510 --------------------------------------------------- 12 Pr. 4 ” 1520 8 Pr. 2½ ” 1418 ” ” 3 ” long guns 1460 4 Pr. 1 ” 1335 ” ” 1½ ” 1508 --------------------------------------------------- 12 Pr. 4 ” 1442 8 Pr. 2½ ” field guns 1422 4 Pr. 1½ ” 1446 --------------------------------------------------- 8 Inch How’r. 1 ” 390 ” ” ” 1 2 oz. ” 516 --------------------------------------------------- 6 Inch How’r. 1 ” 532 ” ” ” 1 12 ” 704 --------------------------------------------------- _Lombard’s Tables._ _VENT._—The vents of English guns are all ²/₁₀ of an inch diameter.—See remark 9 of the article _Velocity_. _WEIGHTS._—See _Measures_. _WINDAGE._—The usual windage of English guns is ¹/₂₀ of the caliber. It appears by experiments, that ¼, or nearly ⅓ of the force of the powder is lost by this windage.—See remark 8 of the word _Velocity_. _Windage of Guns and Carronades._ +--------+---+---+---+---+---+---+---+---+---+---+---+---+ |Natures.| 68| 42| 32| 24| 18| 12| 9| 6| 4| 3| 2| 1| +--------+---+---+---+---+---+---+---+---+---+---+---+---+ |Guns | --|.33|.30|.27|.25|.22|.20|.17|.15|.14|.12|.09| |Carrona.|.15|.15|.15|.14|.12|.12| | | | | | | +--------+---+---+---+---+---+---+---+---+---+---+---+---+ _Windage of Mortars and Howitzers._ From the 13 to 5½ inch the windage is .15 of an inch, and that of the 4⅖ is .2 of an inch. _Windage of French Guns._ _Field Guns._—All one line of windage; about ¹/₅₀ in an 8 pounder. _Siege Guns._—All 1½ line; about ¹/₄₈ in a 24 Pr. _Mortars._—12 Inch; 4 lines of windage. 10 Inch; 1 line, 5 points ” 8 Inch; 1 line, ” _Howitzers._—All; 2 lines ” _WOOD._—Artillery carriages are generally made of elm, ash, and oak. The bed and house of a sea mortar are made of oak, and the bolster of elm. The bottoms of land mortar beds are of oak, and the upper parts of elm. _Carriages_—_Ship._—The cheeks, transoms, and trucks of elm; the axle trees of oak. ” _Garrison._—The whole of oak; trucks, iron.