The number of pieces which are used in making up a musket is forty-nine, each of which has to be formed and finished separately. Of these there are only two--viz., the sight and what is called the _cone-seat_, a sort of process connected with the barrel--that are permanently attached to any other part; so that the musket can at any time be separated into _forty-seven_ parts, by simply turning screws, and opening springs, and then put together again as before. Most of these parts are such that they are formed in the first instance by being forged or rather _swedged_, and are afterward trimmed and finished in lathes, and milling engines, or by means of files. _Swedging_, as it is called, is the forming of irregular shapes in iron by means of dies of a certain kind, called swedges, one of which is inserted in the anvil, in a cavity made for the purpose, and the other is placed above it. Cavities are cut in the faces of the swedges, so that when they are brought together, with the end of the iron rod out of which the article to be formed between them, the iron is made to assume the form of the cavities by means of blows of the hammer upon the upper swedge. In this way shapes are easily and rapidly fashioned, which it would be impossible to produce by blows directed immediately upon the iron. [Illustration: THE BLACKSMITH'S SHOP.] The shop where this swedging work is done at the Armory contains a great number of forges, one only of which however is fully represented in the engraving. The apparatus connected with these forges, differing in each according to the particular operation for which each is intended, is far too complicated to be described in this connection. It can only be fully understood when seen in actual operation under the hands of the workman. The visitor however who has the opportunity to see it thus, lingers long before each separate forge, pleased with the ingenuity of the contrivances which he witnesses, and admiring the wonderful dexterity of the workman. There is no appearance of bellows at any of these works. The air is supplied to the fires by pipes ascending through the floor from a _fan blower_, as it is called, worked by machinery arranged for the purpose below. THE STOCKING SHOP.