Figure 18.
The edges that form the corners are next filed up, keeping all edges straight and at right angles; after this, the edges are beveled a little, forming a mitre which, when soldered, makes a better joint than otherwise.
The sides are next bent up over an iron block placed in the vise as at Figure 18. The corners should be brought well together, using a rawhide hammer, No. 1, [Plate 2].
Plate 23.