EUCALYPTUS TODTIANA. 



Alders, Willows and Poplars as coal-material for the best of gunpowder, yet diverse sorts of 

 Eucalyptus are in Australia employed for furnishing the coal-ingredient of blasting powder. The 

 less heavy kinds would prove doubtless the most eligible in each instance. As yet also more 

 extensive data are wanting to judge of the superiority of particular kinds of Eucalypts for potash, 

 although the writer of this work caused the percentage of this alkali to be determined in reference 

 to the foliage, the bark and the wood of five of the more widely distributed Victorian Eucalypts, 

 and gave the results of these experiments, carried out in his laboratory, as an appendix to his 

 report on the Melbourne Botanic Garden in 1869. It must however be understood, that the 

 yield of potash from trees of the same species is subject to some variation, according to soil ; 

 nevertheless certain sorts of trees have a greater predilection for absorbing potassa^salts than 

 others. At the whole these initiatory researches gave encouraging results, and proved the 

 Eucalypts (as far as subjected to test) richer in potash than those few species of Melaleuca, 

 Casuarina and Banksia tried in comparison. 



Explanation 0¥ Analytic Details. — 1, an unexpanded flower, the lid lifted; 2, an unexpanded flower, dissected 

 longitudinally ; 3, some outer stamens, expanded ; 4 and 5, front- and back-view of anthers, with portion of then' filaments 

 6, style and stigma; 7, longitudinal section of a fruit; 8, transverse section of a fruit; 9, fertile seeds; 10, sterile seeds 

 11, portion of a leaf; all figures magnified, but in various degrees. 



