ARTILLERY. 



The following Table shews the calibres of English guns of all sorts. 



Table of the length, weight, and calibres of brass guns, and of the diameter of their 

 shot, and weight of powder for proof and service. 



N. B. The above charges for service are established by the Board of Ordnance, 

 ]ut in actual service they are commonly reduced to a third of the weight of the shot. 



From the following dimensions of the 

 wheels and axles of an heavy 12 pound- 

 er and of alight six pounder, some idea 

 may be formed of the proportion of other 

 parts of their carrages, and also of those 

 of pieces of artillery of the other rates. 



Diameter of the wheel 

 Height of the axletree 

 Thickness of ditto . . 

 Length of ditto . . . . 



The bed of the 12 pounder is 3 feet 3 

 inches in length. 



The most usual mode by which cannon 

 are discharged is, by applying a kindled 

 match to the touch-hole. Locks on a si- 

 milar pi'inciple to musket locks,h:i. 

 tried in sea service, and have been found 

 to perform very well, but their use is by 

 no means general. 



A very great improvement has been 

 made in matches b\ M. Leroy, who .'.as 

 found that small rods of lime-tree, and 

 some oilier soft woods, prepared with in- 

 fusion of nitrate of lead, or nitrate of cop- 



