Which has more water sap-wood or heart-wood?
Which is stronger green or seasoned wood?
Shrinkage? What makes a plank cut from a tree shrink?
Could a plank shrink without having water in the interior of the cells?
Explain why a plank shrinks across the grain but not along as the eye can see.
Two reasons a log shrinks more along the rings than along the radii.
The effect of this greater shrinkage along the rings?
Which shrinks more, sap-wood or heart-wood? Effect on a plain sawed board? (On a quarter-sawed board?)
Which shrinks more soft or hard wood?
Assignment for Lesson 24—