274 



R. T. BAKER AND HENRY G. SMITH. 



oil. The chemical results here given will probably lead to 

 an exploitation of the tree almost immediately, as similar 

 oils are now in great demand in connection with the treat- 

 ment of ores by the flotation process. 



The botanical and chemical evidence available in the 

 Technological Museum goes to show that this tree is the 

 northern form of E. dives, Schau., and the fruits depicted 

 in the "Critical Revision of the Eucalypts," Part VII, pi. 

 36, and "Forest Flora of N.S.W.," J. H. Maiden, Part XXI, 

 under E. Andrewsi, J.H.M., faithfully delineate those of 

 E. dives, Sen., ("Critical Rev. Gen. Euc." Part VII). The 

 normal leaves of these two trees are identical, as also are 

 the timbers and bark. It seems now that the only differ- 

 ence so far is that no sessile, cordate, sucker (abnormal) 

 leaves have been found in connection with E. Andreivsi as 

 obtains in E. dives. Mr. Cambage informs us that the 

 seedlings of these two trees are different. The oil obtained 

 from the Tenterfield specimens contains practically the 

 same constituents as E. dives, although it is less in yield. 

 These slight differences may perhaps be accounted for by 

 its occurrence on granite ranges from which formation our 

 specimens were obtained. 



Timber Tests. 



TRANSVERSE TESTS. 





No. 1. 



No. 2. 



No. 3. 



No. 4. 



Size of specimen 



B.3; D.3; 



B.3 04; D.3; 



B.3; D.2 99; 



B. 2 99; D. 3'03; 



in inches 



L.36. 



L. 36. 



L. 36. 



L.36. 



Area of cross sec- 



9 



912 



8-97 



9-05 



tion, sq. inches 











Breaking load in 



4,960 



4.990 



4,660 



5 900 



lbs. per sq. in. 











Modulus of rupture 



9,920 



9,849 



9-382 



11,606 



in lbs. per sq. in. 











Modulus of elas- 



1,440,000 



1,578,947 



1,322,269 



1,428,571 



ticity in lbs. per 











sq. inch 











Rate of load in lbs. 



708 



6237 



665-7 



453-8 



per minut« 











