STRUCTURE OF WOOD, &C. 331 



Ligneous parts 0-25713 cubic inch. Sapand vola- 



Sap O 27513 ™" c P arts m 



1 ' wood. 



Air 46774 



rcoooo 



Lastly, the constituent parts of a cubic inch of the wood, 

 taken near the upper extremity of the same branch, were : 



Ligneous parts < 0253 88 cubic inch. 



Sap 0-47599 



Air 0-27013 



1 -ooooo 



For the more easy comparison of the results of these four 

 experiments upon the wood of the lime tree, made on the same 

 day, with different portions of the same tree, I have collected 

 them together in the following 



TABLE. 



The root 



The trunk 



The lower end of a branch... 



The upper end of ditto. . , . 



Wood taken from the trunk 

 of a lime tree of the same 

 age, on the 20th of Jan. . 



} 



Being desirous to ascertain whether a difference considerable 

 enough to be valued, existed between the wood of the heart, or 

 core, and the sap wood found between the rhind and the body 

 of the same tree « I took on the nth of September, an elm 

 faggot, five inches in diameter, lopped from a large tree, which 

 had been felled on the 20th of the preceding April, and bad 

 two cylindrical pieces, each six inches in length, cut out of it. 

 The thickest of these taken from the core, weighed 191 '05 

 grammes, and displaced 194*45 grammes of water $ the other, 



Z *2 consisting 



