Fig. 48.
Now before beginning to glaze you must stretch and straighten the lead; and this is done as follows (fig. 49—[Frontispiece]).
Hold the "calm" of lead in your left hand, and run the finger and thumb of your right hand down the lead so as to get the core all one way and not at all twisted: then, holding one end firmly under your right foot, take tight hold of the other end with your pliers, and pull with nearly all your force in the direction of your right shoulder. Take care not to pull in the direction of your face; for if you do, and the lead breaks, you will break some of your features also. It is very important to be careful that the lead is truly straight and not askew, otherwise, when you use it in leading, the glass will never keep flat. The next operation is to open the lead with a piece of hard wood, such as boxwood or lignum-vitæ (fig. 50), made to your fancy for the purpose, but something like the diagram, which glaziers call a "lathykin" (as I understand it). For cutting the lead you must have a thin knife of good steel. Some use an old dinner-knife, some a palette-knife cut down—either square across the blade or at an angle—it is a matter of taste (fig. 51).
Fig. 50.
Fig. 51.
Having laid down your leads A and B (fig. 52), put in the corner piece of glass (No. 1); two of its sides will then be covered, leaving one uncovered. Take a strip of lead and bend it round the uncovered edge, and cut it off at D, so that the end fits close and true against the core of lead A. And you must take notice to cut with a perfectly vertical cut, otherwise one side will fit close and the other will leave a gap.
