141 



8. White. 

 E. Dunnii. E. nitens. 



E. fraxinoides. E. regnans. 



Maiden, 1921. — Here follows the classification I submit as a practicaly 

 useful one. 



It will be seen that my scheme is mainly based on colour. Other characters of 

 ready application are fissility and its opposite (interlockedness), weight and hardness. 

 It does not seem safe in the present state of our knowledge, and in the absence of 

 detailed information, to bring in other factors. 



No doubt some of the descriptions are similar to others in somewhat different 

 verbiage, but, where possible, I have quoted the actual words of different authorities, 

 or made by me at the time. 



There is a certain amount of parallelism with the bark classification, but, in the 

 present state of our knowledge, perhaps not much, and it has to be applied with care. 



The normal colour of Eucalyptus timber is pale (" white "). The browns and 

 the reds are due to tannins. The dull cigar-brown timbers of the interior I look upon 

 as a later oxidation stage of the reds. 



The Timbers may be provisionally arranged as follows : — 

 . 0. Mallees. 



1. Pale Hardwoods — 



A. Peppermint. 



B. Mountain Ash. 



C. White Mahogany. 



D. Blackbutt, 



E. Stringybarks. 



F. Coriacese. 



G. Brittle Gums, pinkish when newly cut : — 



(a) Gums. 



(b) Half-barks. 



(c) Rough barks. 

 H. Pale inlocked timbers. 



2. Brown Hardwoods. 



3. Red Hardwoods— 



A. Red Gums. 



B. Blue Gums. 



C. Grey Gums. 



D. Red Box. 



E. Mahogany. 



F. Woolly Butt. 



