_Stone Mortars_—80 rounds per mortar, for every 24 hours, from the establishment of the demi parallels to the capitulation; about 13 days. _Light_, and _Fire balls_—Five every night, for each mortar, from the opening of the trenches to the eighth day, and three from that time to the end These amount to about 700 for guns. 400 for mortars. 1000 for stone do. This proportion and arrangement is however made upon a supposition, that the place has no countermines to retard the progress of the besiegers, to a period beyond what is abovementioned; but the same author estimates, that a similar place, with the covert way properly countermined beforehand, and those countermines properly disputed, may retard a siege at least 2 months; and that if the other works be likewise effectually countermined and defended, the siege may be still prolonged another month. The above proportion is therefore to be further regulated, as the strength of the place is increased by these or any other means. These considerations should likewise be attended to, in the formation of an estimate of ammunition and stores for the siege of a fortified place. See _Carriage, Platform, Park_, and the different natures of artillery, as _Gun, Mortar, Howitzer_, &c. The small arms ammunition is estimated by this author as follows: ¼ of a pound of gunpowder, or 10 rounds per day, per man, for all the ordinary guards. 1¼ lbs. or 50 rounds per man, per 12 hours, for all extraordinary guards. ⅝ of a pound, or 25 rounds for every man on picket, during the period of his duty. _AXLETREES_—See the word _Carriages_. _BALLS_—of lead, of different natures. +--------------+--------+----------+--------------+ | | Number | Diameter | Number made | | Nature. | to one | in | from one ton | | | Pound. | Inches. | of Lead. | +--------------+--------+----------+--------------+ |Wall pieces | 6¾ | .89 | 14,760 | |Musquets | 14½ | .68 | 32,480 | |Carbine | 20 | .60 | 44,800 | |Pistol | 34 | .51 | 78,048 | |7 Barrel guns | 46½ | .46 | 104,160 | +--------------+--------+----------+--------------+ Lead balls are packed in boxes containing each 1 cwt. About 4 pounds of lead in the cwt. are generally lost in casting. See _Shot_. _BARRELS for powder_--Their dimensions.