EUCALYPTUS GLOBULUS. 



Experiments on Tensile Strength. 



Number of the Specimen. 



Dimensions of each piece. 



Specific Gravity. 



Weight each piece broke with. 



Direct cohesion on 1 square inch. 



7 



8 



9 



10 



11 



inches. 

 > 2 X 2 X 30 < 



-997 



1-079 



1-037 



■ 1-108 



1-026 



lbs. 

 14,560 



26,600 



24,360 



26,600 



28,840 



lbs. 

 3,640 



6,650 



6,090 



6,650 



7,210 



Average 







1-049 



24,192 



6,048 



Vertical or Crushing Strain on Cubes op 2 inches. 



No. 12. 



No. 13. 



No. 14. 



No. 15. 



No. 16. 



No. 17. Average. 



Average on 1 square inch. 



tons. 

 12-875 



tons. 

 13-000 



tons. 

 12-750 



tons. tons. 

 11-125 10-500 



tons. 

 13-625 



tons. 

 12-312 



tons. 

 3-078 



The tensile strength as given by Jas. Mitchell is greatly in excess of that recorded by Laslett, 

 but is fairly in accord with some recent observations by Mr. F. C. Campbell of Geelong. (*See 

 Proceedings of the Eoyal Society of Victoria 1879.) 



Results of Experiments on the transverse strength of Wood of Eucalyptus globulus, instituted by Baron 

 von Mueller and J. G. Luehmann. The pieces -were 2 inches square, 2 feet long between the 

 supports, the weight suspended in the middle, both ends free. The timber was seasoned for nine 

 months. 







Deflection. 





Total Weight 



required to break 



each piece. 









With the Apparatus 

 weighing 780 lbs. 



After the Weight 

 was removed. 



At the crisis of 

 brealdng. 



Specific Gravity. 





inches. 



inches. 



inches. 



lbs. 







1 



-12 



-04 





75 



2,444 



1,833 



■938 



2 



-08 



nil 





62 



3,224 



2,418 



-992 



3 



•16 



-04 





58 . 



2,256 



1,692 



-913 



4 



-12 



-04 





75 



2,661 



1,996 



-942 



5 



•10 



-02 





75 



2,740 



2,055 



-946 



6 



•12 



-03 





55 



2,288 



1,716 



-927 



7 



■12 



-02 





75 



2,409 



1,807 



-924 



8 



•12 



-04 





58 



2,280 



1,710 



-845 



9 



-16 



-04 





62 



2,252 



1,689 



-852 



10 



-05 



nil 





68 



3,752 



2,814 



1-094 



11 



-08 



uU 





65 



3,024 



2,268 



1-096 



S (strength) = ^ (length) X TT (weight) 



4x6 (breadth) x d' (depth multiphed by itself) 



