213 



Ash Tests. 

 Cubes, similar to those used in the charcoal tests, were burnt in platinum crucibles. 

 The following table (Table 1) gives the weights of charcoal and ash produced from one ton of wood. 

 The third column is the weight of ash produced from one ton of charcoal. 







Weight of 



Weight of Ash 



Weight of Ash 



Botanical Name. 



Local Name. 



Charcoal 



from Wood 



from Charcoal 







in pounds. 



in pounds. 



in pounds. 



E. bicolor 



Black Box 





805 



1-340 



3-98 



E. rostrata ... 





Red Gum ... 





696 



0-636 



2-05 



E. Stuartiana 





Apple Gum 





681 



7-280 



23-89 



E. sideroxylon 





Red Ironbark 





656 



0-957 



3-26 



E. hemiphloia 





Grey Box 





656 



17-270 



60-03 



E. ■polyanthema, 





Red Box 





647 



4-150 



13-86 



E. maoTorrhyncha 





Stringybark 





637 



0-668 



' 2-40 



E. meUiodora 





Yellow Box 





631 



6-380 



22-70 



E. obliqiia 





Messmate ... 





600 



0-718 



2-68 



E. globulus ... 





Blue Gum 





599 



5-216 



19-63 



E. amygdalina 





Peppermint 





593 



1-079 



4-23 



E. botrijoides 





Gippsland Mahogany 





584 



2-300 



8-84 



E. eugenioid.es 





White Stringybark 





583 



0-291 



1-11 



E. Bosistoana 





White Box 





574 



17-158 



67-00 



E. Gonsideniana 





Yert Chuck- 





557 



0-980 



3-93 



E. viminalis 





White Gum 





539 



4-062 



17-63 



E. jntlverulenta , 





Woollybutt or mealy Stringy 



463 



0-792 



3-96 





bark. 









Calorimetric Tests. 

 Cubes, similar to those used above, were also adopted in these tests. A Berthelot-Mahler bomb 

 calorimeter was employed to determine the calorific values, which are here (Table 2) expressed in calories, 

 per gramme : — 







Calorific Value 



Calorific Value 



Botanical Name. 



Local Name. 



of 



of 







Charcoal. 



Wood. 



E. f ugemoides 



. White Stringybark ... 



7,912 



4,680 



E. obliqua ... 



. Messmate 





7,901 



4,594 



E. meUiodora 



. Yellow Box 



. . 



7,895 



4,693 



E. pulverulenta 



. Woollybutt or mealy Stringybark 



.. 



7,853 



4,604 



E. rostrata 



. Red Gum 





7,842 



4,811 



E. rostrata 



. Red Gum 





7,018 



4.250 



E. macrorrhymha 



. Stringybark 





7,839 



4,674 



E. Stuartiana 



. Apple Gum 





7,819 



4,703 



E. Comideniana 



. Yert Chuck 





7,802 



4,576 



E. viminalis 



. White Gum 





7,749 



4,670 



E. botrijoides 



. Gippsland Mahogany 





7,758 



4,756 



E. globulus 



. Blue Gum 





7,736 



4,560 



E. amygdalina 



. Peppermint 





7,731 



5,099 



E. bicolor 



. Black Box 





7,610 



4,595 



E. hemijMoia 



. Grey Box 





7,052 



4,422 



E. polyanthema ... 



. Red Box 





7,044 



4,828 



E. sideroxylon 



. Red Ironbark ... 





6,995 



4,528 



E. Bosistoana 



. White Box 





6,715 



4,431 



The numbers in italics represent the results of experiments on undricd specimens, which contained 

 at least 12 per cent, of moisture, showing a reduction of the calorific value of charcoal by 10 per cent., 

 and that of wood by 11-5 per cent. 



