The corners may then be cut out as at B, filed up square, and beveled as in the box. The sides are then bent back over a block of wood or metal, bringing the corners well together. They are then soldered. A metal saw is used to make the opening, A, the edges of which are then filed up square.
The back for this frame is made in the same way as the front except that it is left perfectly plain. This should be made to fit inside of the frame tight enough so that no fastening will be needed to hold it in place.
A frame of this size and kind may be made to hang or to stand. If it is to hang, a small ring may be made and fastened to the back as shown at C. If it is to stand, a support of some kind such as is shown at D is needed. This is made of the same thickness metal as the frame and may be made in many outlines. This support may be made stationary by riveting it to the back, or hinged, which is much better, as is shown at E and F. The hinge is made by taking a piece of about 1/8" tubing and cutting three pieces, making one of the pieces equal in width to the other two and having the three equal in width to the top of the support. The two short pieces are soldered to the back and the long piece to the support. A piece of wire equal in diameter to the hole in the tube is then cut and put in place which hinges the back and support together.
The method of making the tubing used for the above is described on page [110].
Plate 33.