PATTERN MAKING 



79 



When the scraping tools are kept sharp so that they will cut 

 freely and without pressure, a light touch of sand paper only will 

 be required. 



In the construction of this pattern, it maybe made of 1\\o 

 blocks of 1^-inch stock as described; but the tendency of the two 

 halves will be to become rounding on the 

 parting line as shown by the dotted lines 

 c d and e f, Fig. 155. This is caused by 

 the removal of considerable wood in 

 the process of turning, at the angles 

 a a a a thus exposing fresh surfaces 

 which are farther removed from the 



Fig. 155. 



original surfaces of the plank, than the surfaces on the line 

 of parting. The exposure of these deep, inside fibers of the 

 wood will cause a shrinkage of the pores and draw the pattern more 



or less, according to the position 

 of the annular growths, and also 

 to the more or less thorough sea- 

 soning of the wood, in the direc- 



GOOD 



BETTER 



Fig. 156. 



tion indicated. If the pattern is 

 intended for temporary use only, 

 it may be constructed as above, but if durability and permanence 

 of shape are required, the two blocks should each be glued up out 

 of thinner stock with the annular growths carefully reversed, as 



Fig. 157. 



shown in Fig. 156. This is done not only because thin plank is 

 more evenly and better seasoned, but because in gluing, the ten- 

 dency of the pieces to warp or spring is counteracted each by the 

 other, and in addition the gluing of several thin pieces together 



