Inquiries relative to the Structure of Wood. 449 



same tree, but less than that cut from the upper end of 

 one of its branches. 20.48 grammes of thin shavings, 

 from this piece of the root of the lime, weighed only 

 10.85 grammes after being thoroughly dried in the 

 stove. 



From these data, I determined the constituent parts 

 of a cubic inch of the root thus : 



Ligneous parts 0.28775 cubic inch. 



Sap ...... 0.37358 



Air 0.33867 



i.ooooo 



The constituent parts of a cubic inch of the body of 

 the same tree were, as we have shown : 



Ligneous parts ..... 0.26489 cubic inch. 



Sap ...... 0.36546 



Air 0.36965 



i.ooooo 



The constituent parts of a cubic inch of the wood of 

 the same tree, taken the same day from the lower ex- 

 tremity of a branch, were : 



Ligneous parts 0.25713 cubic inch. 



Sap 0.27513 



Air . . . . . . . 0.46774 



i.ooooo 



Lastly, the constituent parts of a cubic inch of the 

 wood, taken near the upper extremity of the same branch, 

 were : 



Ligneous parts 0.25388 cubic inch. 



Sa P -47599 



Air 0.27013 



i.ooooo 



VOL. II. 29 



