OF ASH IN FOREST TREES. 



315 



8. White Elm ( Ui'mus americana) . 



Sap wood. Heart wood. Outside bark of trunk. 



Water - 34-65 49-50 19-00 



Dry - 65-35 50-50 81-00 



Ash - 0-80 0-35 8-25 



The elm gave, on ignition in a close vessel, 15-84 per centum of charcoal, or matter free 

 from volatile elements : subtracting the inorganic matter, it leaves 15-04 per centum of 

 pure charcoal. The outside bark of this elm consists of alternate layers of common lig- 

 neous matter and cork, which, though thin, is fine and elaistic. 



9. Chestnut {Castanea vesca). 



Wood of the tmnk 



Water 42-35 



Dry 57-65 



Ash 0-48 



The percentage of charcoal in this wood amounts to 9-75 only : ash being deducted, it 



leaves 9-27. 



11. Willow. Trunk ten inches in diameter. 



Water 



Dry 



Ash 



12. Grape vine ( Vitis labrusca) . 



Wood. 



Water 40-26 



Dry 59-74 



Ash 0-98 



13. Black Ash. Seasoned wood. 



Sap wood. 



Ash 0-34 



Bark. 



819 



