316 



PROPORTIONS 



14. Bass-wood (Tilia americana) . 



Sap wood. Bark. 



Water 51-30 46-32 



Dry 4S-70 53-68 



Ash 0-28 3-57 



15. Black Birch (Betula excelsa) . 



Sap wood. Heart wood. 



Water 38-90 34-61 



Dry 61-10 65-39 



Ash ... 0-05 0-26 



The black birch gives 16- 01 per centum of charcoal : deducting the inorganic matter, it 

 leaves 15 '96 per centum from which all volatile matter is expelled by ignition in close 

 vessels. 



16. Staff-tree (Ceraslrus scandens) , 



Water 



Dry matter .... 

 Ash 



Ash calculated on the dry matter 



Bark. 



Wood. 





39-091 



46-094 





60 909 



53.906 





4-608 



0-523 





7-582 



0-971 



S. 



III. FRUIT TREES. 

 1. Pear tree. 



Sap wood. Heart wood. Bark of the trunk 



Water 48-80 22-05 63-70 



Dry 37-20 77-95 3030 



Ash 0-20 0-10 1-99 



Root of the Pear tree. 



Wood. Bark. 



Water 22-33 58-80 



Dry 79-67 46-20 



Ash 0-40 3-26 



The wood of the pear gives 9-79 per centum of charcoal. The wood of the pear is soft, 

 close grained and easily wrought, and hence is sometimes substituted for box in large 

 wood engravings. 



2. Sweet Apple tree. 



Water - 

 Pry 



Ash - - - 



Sap wood. 



Heart wood. 



Bark of the trunk. 



39-10 



33-35 



59-00 



60-90 



66-65 



41-00 



0-35 



016 



4-55 



