OF WOOD IN GENERAL. 



vessels, which occupy the greater part of the spring wood of each 

 ring (Fig. 27). On a radial section the layers appear as parallel 



stripes, and on a tangential one as broader and less parallel 

 stripes; but, whilst in coniferous woods the dark bands were 

 denser summer wood, in this case the darker parts are produced 

 by the vessels in the spring wood, the more uniform fibres of the 



