3t( 



PROPORTIONS 



14. Bass-wood {Tilia americand) , 



Water 



Dry 



Ash 



Sap wood. 



51-30 



48-70 



0-28 



Bark. 



46-32 



53-68 



3-57 



15. Black Birch (Betxda excelsa) . 



Water 



Dry 



Ash ... ... 



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 (Cerastrus scandeTis) . 



Water 



Dry matter .... 

 Ash ..... 



Ash calculated on the dry matter 



Bark. 



39 091 



60-909 



4-608 



7-582 



Wood. 



46 094 

 53.906 



0-523 



0-971 S. 



1. Pear trek. 



Water 

 Dry 



Ash 



III. FRUIT TREES. 



Sap wood. 



48-80 



37-20 



0-20 



 Root of the Pear tree. 



Water 



Dry - - - - 



Ash .... 



Heart wood. 



22-05 



77-95 



0-10 



Wood. 



22-33 



79-67 



0-40 



Bark of the trunk. 



63-70 



30-30 



1-99 



Bark. 



58-80 



46-20 



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 - 



Dry - - - 



Ash 



