SELLING LUMBER 



449 



10. A sound knot is one solid across its face, is as hard 

 as the wood it is in, and is so fixed by growth or position that 

 it will retain its place in the piece. 



11. A loose knot is one not held firmly in place by growth 

 or position. (See page 452). 



STANDARD KNOT. 



12. A pith knot is a sound knot with a pith hole not more 

 than *4-inch in diameter. (See page 453). 



13. An encased knot is one surrounded wholly or in part 

 by bark or pitch. Where the encasement is less than one-eighth 



