552 



^^^s^ 



FipT. 118. Red wood from the under side of a spruce branch (Cross-section). The 



uppermost cell row is spring wood; the lower four rows are red wood with 



large intercellular spaces (at the left). (After R. Hartig.) 



Fig. 119. Cross-section through strain wood on the upper surface of 

 a spruce branch. (Alter R. llai-tig.) 



