203 



In Gr. A. Julius' " Western Australian Timber Tests, 1906," which embodies 

 the physical characters of the timbers of that State (and some others), in Schedule I 



we have — 



Name of Timber. 



Wheie grown. 





Specific Gravity, 



&c. 









Weight in lb. r.er ci 



bic foot. 



Moisture when 

 Green. 













Local Name. 



Botanical Name. 





Average 



when 

 First Cut. 



Average of 



12 per cent 



Moisture 



Per cent. 



of Drv 



Weight. 



Average 



Dry 

 Weight. 



Per cent. 



of 



Total 



Weight. 



Per cent, 

 of 



Dry 

 Weight. 



Jarrah 



E. marginata ... v ... 



W.A. 



68 



55 



48 



33 



50 



Karri 



E. diversieolor ... 



,, .. . 



72 



58 



50 



35 



54 



Tuart 



E. gomplwcephala 



,, . . . 



78 



68 



60 



30 



43 



Wandoo ... 



E. redunea 



;> • • • 



79 



71 



63 



22 



28 



Blackbutt 



E. patens 



j) 



69 



54 



46 



38 



61 



Eed Gum 



E. calophglla ... 



; j 



72 



56 



47 



43 



75 



Yate 



E. cor nut a 



J J . . . 



79 



71 



64 



24 



32 



York Grum 



E. loxophleba (fcecunda) 



j, . . . 



77 



67 



59 



23 



30 



Salmon Gum 



E. salmonophloia 



JJ . .. 



70 



66 



60 



20 



25 



Morrell ... 



E. longicornis 



JJ ' ' * 



73 



64 



56 



23 



30 



Ironbark 



E. paniculata, crebra, &c 



N.S.W. ... 



76 



71 



. . . 



. .. 





Tallow- wood 



E. microconjs ... 



,, 



74 



63 





... 





Blackbutt 



E. pilularis 



,. 



66 



57 









Spotted Gum 



E. metadata 



,, 



67 



60 









Flooded Gum ... 



E. saligna 



j, . . . 



74 



63 









Grey Gum 



E. propinqua. &c. 



., 



71 



65 



... 







'■ Grev or White 



E. hemipHoia ... 



■ j . . . 



74 



68 









Box. 

















Red Gum 



E. rostrala 



Vie. 



65 



59 





. . . 





Blue Gum 



E. globulus 



Yic and Tas. 



67 



57 









Stringybark 



E. obliqua 



jj 



64 



56 





... 





From the figures given in Schedule No. I the following deductions have been 



made : — 



A. Specific gravity, and its relation to strength. 



The heaviest of ;he Western Australian timbers, and of all the Australian timbers of note, are Yate 

 and Wandoo, which when first cut both average 79 lb. per cubic foot, Tuart and York Gum following 

 closely with weights of 78 and 77 lb. respectively. 



When seasoned, i.e., at 12 per cent, moisture, Yate and Wandoo are still the heaviest, with Tuart, 

 York Gum, Salmon Gum. and Morrell following in that order. 



It has been stated that the weight and density of a seasoned timber is to a certain extent a measure 

 of its strength, and this is borne out in the case of Yate, which is the heaviest and very much the 

 strongest of the Australian hardwoods; and although Wandoo and Tuart do not come next in order of 

 strength, yet both are well to the front. 



It is more nearly correct, however, to state that, the greater the density, and therefore the weight, 

 the greater is the strength to resist compressive strain, whether applied edgewise or crosswise; and this 

 is fully borne out by the results of the tests, in which the relative positions are, Yate, Wandoo, Morrell* 

 Tuart. Salmon Gum, and York Gum. 



