PLATE VII 



(a) 3rd annual ring. 



(6) 4th annual ring. 



4^ 



(c) lOth annual ring. 



Fig. 1. X-ray diagrams of late wood from one transverse slice of a trunk of 

 Pseudotsitga taxifolia. Beam perpendicular to grain, CuKa. Note that as the lateral 

 arcs become shorter tangential ly, the intensity along the meridian dimmishes. 



