Part 19

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.

” _Field._—Heavy 24 and 12 Pr. the cheeks and transoms of elm; the axle trees of ash. In the wheel the nave and fellies are of elm; the spokes of ash; limber shafts, bars, and axle trees are of ash. Light guns, from 3 to 12 Prs. the cheeks and transoms are of elm; the ammunition boxes are of fir. In the wheels, the nave is of elm, the spokes of oak, and the fellies of ash. In the limber the shafts and bars of ash.

THE END.