PLANING THE STRIPS 83 



inch; and they are one-inch wide. Machine-screws, 

 %e inch in diameter and with rounding heads, secure 

 the bar-arms of the braces to the bars. The longer 

 arms are fastened to the wooden baseboard by one- 

 inch wood-screws having rounded heads, and small 

 iron washers are used under their heads. The holes 

 in both arms of the braces are made larger than 

 needed merely to accommodate the screws, to per- 

 mit of considerable play and consequent separation 

 of the halves of the mold. If desiring still more to 

 increase this range of side-play of the bars, you can 

 enlarge the screw holes in the long arms of the 

 braces by filing them out with a small rat-tail file, 

 thus converting these round holes into slots. Five 

 pairs of braces, centered 10% inches apart, are used; 

 and note, as shown in the Fig. 2 illustration of the 

 mold, that it will be an added convenience in adjust- 

 ing it to have the screws that secure the long arms 

 set to one side of those fastening the short arms, 

 instead of having the two sets of screws line up 

 opposite ; thus they will not interfere with each other. 

 The whole arrangement is at once understood by 

 reference to the diagrammatic illustrations, Fig. i 

 representing a sectional or end view, and Fig. 2 

 being a top view of the mold. It remains but to ex- 

 plain its adjustment. Suppose, for example, it is 

 desired to make a butt-joint 3% feet long, having a 

 diameter of % inch at its larger end and of % inch 

 at its smaller end measuring, please remember, 



