106 ABC OF THE STEEL SQUARE 



This method will apply no matter where the 

 newel is placed, or whether the easement is less 

 or more than the one step of the example illus- 

 trated. What is meant by one step is, that the 

 tangent of the straight rail continues to the 

 point 2, Fig. 69. The tangent 2-1 is level. 



Fig. 70. 



To produce the face mould, lay the steel 

 square in the position indicated by the lines 1, 2, 

 3, 4, not the figure on the square at the points 

 numbered, and transfer them to a piece of thin 

 stuff, Fig. 70. Line 3-4 in Fig. 70 is indefinite. 

 Now take the length of the long edge of the 

 pitch board in the compasses, and with 2, Fig. 

 70, as a center, cut the line 3-4 in 4 and draw 

 '2-4. Now 1-2 is the level, and 2-4 is the pitch 

 tangent on the face mold. 



To get the bevels and width of the face mold 

 at both ends, take the distance 3-4 on the blade 

 of the square, and the height of a riser on tin- 

 tongue of the square, apply to the edge of . 



