I'I.ATF. 47. PSEUDOTSUGA DoUGLASii. Tangential section showing the low and 

 broad ordinary rays, together with the often very unequal and narrow fusi- 

 form rays. X 46.8 



I'I.ATF. 48. LARIX AMERICANA. Transverse section showing the dense and broad 

 summer wood and the distribution of resin canals, x 46.8 



