Being the Result of Fifty Years' Practice and Observation : with Specific Remarks on Fowling Pieces, the Percussion Lock, and Fire-arms in General : to which are Subjoined Descriptions of a New Bullet Mould and Clipper, Various Improvements in Gun and Door Locks, and Spring Bolts : a Description of Fire-arms Deposited in the Royal Arsenal at Woolwich, Including All the Improvements and Inventions for which Three Silver Medals Have Been Awarded by the Society of Arts : Together with Tables of Weights of Balls, Descriptive Plates, &c