216 



Wood-ash Tests.— Interesting information was obtained from an analysis of the ashes of several 

 species of timber. Two pounds of ashes of each timber were obtained in the following way :— Pieces of 

 the timber were burnt in an ordinary oil drum, which had been perforated with i-inch holes about 3 inches 

 from the bottom to admit of sufficient draught. 



The tests are as yet incomplete, but the percentage of unburnt carbon in each sample and the 

 percentage of potash in the true ash has been determined for the following species : — 









Percentage of 

 Unburnt 



Percentage of 



Timber. 



Botanical Name. 



District. 



Carbon in 

 sample. 



Potash 

 in true ash. 



Mountain Gum 



E. goniocalyx 



Bermagui (Moruya) 



30-60 



6-85 



Mountain Ash ... 



E. Sieberiana 



,, >? 



30-57 



5-57 



Woollybutt 



E. longifolia 



» s) 



17-60 



6-36 



Yellow Stringybark ... 



E. Muelleriana 



»j j> 



9-70 



5-59 



Yellow Box 



E. melliodora 



Dubbo 



16-74 



•28 



Spotted Gum ... 



E. maeulata ... 



Wyong 



20-02 



4-70 



Blue Gum 



E. saligna 



,, ...* 



26-14 



5-17 



Grey Box 



E. Jiemiphloia 



,, 



24-81 



2-95 



Mountain Ash 



E. gigantea ... 



Tumbarumba 



20-02 



9-23 



Grey Ironbark 



E. paniculata 



Casino 



22-89 



•13 



Red Ironbark ... 



E. siderophloia 



,, ... ... 



21-32 



1-02 



Forest Bed Gum 



E. tereticornis 



)> ■ • ■ • * • 



47-03 



1-58 



Grey Gum 



E. punctata ... 



,, ... ... 



24-66 



•26 



Blackbutt 



E. pilularis ... 



Taree 



40-31 



2-04 



(Report of Forestry Commission, New South Wales, for year ended 20th June, 

 1918, p. 22.) 



Some determinations of Ashes of Eucalypts by J. C. Brunnich, Agricultural 

 Chemist, will be found in the report of the Director of Forests for 1918 in Annual 

 Report of Department of Public Lands, Queensland, p. 60. 



Explanation of Plates (220-223). 

 AUSTRALIAN HYBRIDS. 



PLATE 220. 



Eucalyptus sideroxylon A. Cunn. 

 let. Juvenile leaf ; 16, mature leaf ; lc, flowers; Id, anther; le, fruits not quite ripe, and showing remains 

 of filaments. Maryborough, Victoria. (J. Blackburne.) 



Eucalyptus sideroxylon-leucoxylon hybrids (2 and 3). 



2a. Juvenile leaf; 26, mature leaf; 2c, buds and a flower; 2d, anthers; 2e, fruits. Black Waterholes, 

 near Redcastle, Victoria. (W. S. Brownscombe, No. 12a, through J. Blackburne.) 



3a. Twig, bearing an intermediate leaf, buds and a flower ; 36, mature leaf ; 3c, anther ; 3d, immature 

 fruit, showing style and stigma, and deciduous ring; 3e, fruits, showing one end on. Black 

 Waterholes, near Redcastle, Victoria. (W. S. Brownscombe, No. 11a, through J. Blackburne.) 



Eucalyptus leucoxylon F.v.M. 

 4a, 46. Glaucous juvenile leaves; 4c, mature leaf; id, anther; 4e, immature fruits, showing stamens and 

 ring; 4/, fruits. Maryborough, Victoria. (J. Blackburne.) 



