BAT 



BAT 



^ TABLE for the ccnjlruaion of Battcrits. 



When batteries are ereftcd at leifiire, and are d&'igned to 

 (land for fome years, they arc bed made of ftor.e, or brick, 

 or good loamy earth, as the materials may be moll ealily 

 procured. 



To conftruft the profile of a battery, let its ground line 

 be AB {Plate II. Forilf. f^. 23. N° 2.), BD that of the 

 parapet, the inner flope of which is formed by making Y>a 

 = I i- foot, and the peipendicular « H' — 6 or 7 feet ; the 

 crown of the parapet HI is formed by making b\ a foot or 

 two lower than a H ; and the front of the battery IB is 

 found by making iB =.\b\ when of earth, or=i of b\ when 

 of mafonry. if DC be made = 2| or 3 feet, we (hall have 

 C the fill of the cmbrafure, the floor of which CG is to dip 

 a foot or two below the level line CF. The platform DE 

 is 1 8 or 20 feet, the tail E rifing about 6 inches above the 

 level line AB ; the lower double line reprefents the flceper 

 laid Icngthwife, and the upper double line fhaded with the 

 lines acrofs (hews the ends of the planks laid on the (leepers. 

 A gun on its carriage, with the wheels againft the knocker 

 at D, is annexed to the figure, for the purpofc of aiding the 

 apprchenfion. For the conflruclion of the embrafures, mer- 

 lons, ramp?, &c. fee the articles rcfpcftively. 



Batterv, Open, is nothing more than a number of can- 

 non, generally field-pieces, or fuch as carry a ball not ex- 



ceeding nine pounds weight, ranged in a line or row a-breaft 

 of one another, on fome fmall natural elevation of the ground, 

 or an artificial bank about a yard or two high. Thcfe can- 

 nons are ranged at the di (lance of about 15 or 16 feet from 

 one another; their (hot and loading utenfils lying by their 

 fide, and the powder lodged in a hole at fome diftance be- 

 hind the batter)'. 



Battery, Covered, is when the cannon and gunners are 

 covered by a bank made of brufli-wood, faggots, and earth ; 

 about eighteen or twenty feet thick, and feven or eight 

 feet high. Tiic cannon ufcd in fuch batteries are generally 

 from nine to eighteen pounders ; fomctimes twenty-four 

 pounders are ufcd in them. See Fascine Battery. 



Battery, futiL or buried, is that whofe platform is funk 

 or let down into the ground, with trenches cut into the 

 earth againft the muzzles of the guns, to fcr\'e for em- 

 brafures. 



Tliis fort, which the French call batler'ie en terre, and 

 rulmante, is generally ufed upon the firfl making approaches, 

 to beat down the parapet of the place. 



Batteries, Crofs, are two batteries at a confiderable di- 

 ftance from each other, which play athwart one another at 

 the fame time, and upon the fame point, forming right 

 angles; £0 that they thus combine and produce a greater 



effed; 



