i887.] 



NEW-YORK MICROSCOPICAL SOCIETY. 



31 



Pearl river, Mississippi." According to Prof. C. S. Sargent, in 

 Tenth Census Report. 



In many respects it is an exceptional tree, and one of great 

 economical value, growing from seventy to ninety feet in height, 

 and two to four feet in diameter ; the latter is not common. 



In the North especially it is a slow grower, the annular lay- 

 ers being riarrow, from sV to tV of an inch in thickness, and 

 as seen in the photomicrograph. Fig. I., the tracheids are small, 

 thin walled, the wood being classed as soft and fine grained. 





m Mmmmmi) . a a 





K \M'TiVJr5 .??rj r r 







Wri A' l Ww i Vfy i V i T n' M f / n 'l H U i /ii ww 



r:'iI7tMr«Ta«'a'aVS7(ra'a>«WVi«sS'aaiaB«««5aaaai««aa«aaaas 





Fig. I. White Cedar. Transverse Section Magnified 50 Diameters. 

 Its specific gravity ranges from 0.29 to 0.45, the latter being 

 uncommon, 0.30 to 0.35 being the general range of the wood 

 from the North. It is one of the group of the light coniferous 

 woods. Sequoia gigantea, Decsn, Big Tree, Thuya occidenta- 

 lis, Arbor yitse, are as a rule 0.0 1 or ^0.02 lower in specific 

 gravity. 



