138 PATTERN MAKING 



board and the sand of the drag rammed down upon its upper 

 face, it would be sprung out of shape. To avoid this the follow 

 board A is made to exactly fit the under side of the pattern. Then 

 when the sand is rammed, the whole pattern is supported and there 

 will be no distortion. When the cope is rammed the follow board 

 is removed and the sand of the drag supports the pattern while 

 the cope is being rammed. 



