PLATE 45. TSUGA PATTONIANA. Tangential section through the spring wood 

 showing the character of the medullary rays, x 46.8 



PLATE 46. PSEUDOTSUGA DOUGLASII. Transverse section showing the broad 

 and dense summer wood in a coarse-grained form, and the distribution of 

 the resin canals. X 46.8 



