326 



Transverse Tests of Timber, Araucaria Ciiinii)igJia))i!i\ New South ^^'ales. 



(Standard sizes, 38 in. x 3 in. x 3 in.) 



Xo. I. 



No. 2. 



No. 3. 



Size of sjiecimen in inches 



B 



2-q2 



: D_'q3 



B 



2-02 : D 2 go 



B 



2-90 



: D 2-qi 



Area of cross section, square inches 







8-.X5 





8-46 







S-4,'. 



Breaking load in lb. jier .square indi 







6.735 





Ct.Cioo 







5,200 



Modulus of rupture in lb. per square incli ... 







lO.idS 





I2,qf)3 







11,470 



„ elasticity ,, 





2 



.659.977 





2.777.142 





2 



742,857 



Rate of load in lb. per minute 







361 





414-5 







472 



Transverse Tests of Timber, Araucaria Cunninghamii , Queensland. 



Size of specimen in inches 

 Area of cross section, square inches ... 

 Breaking load in lb. per square incli 

 Modulus of rupture in \h. jier square inrli 



,, elasticity ,, ,, 



Rate of load in lb. jier minute 







No. I. 



No. 2. 



No. 3. 





B 



3-00; D 3-00 



B 3-00; D 3-00 



B 2-qr); D 2-95 







9-00 



9-00 



8-73 







5,000 



5.350 



5.000 







10,000 



10,700 



11,250 







1,986,206 



2,133.333 



1.944.000 







455 



446 



500 



(b) An.atomv. 



Several botanical workers in Einope have recorded distinctive differences 

 in the x}-icm of the Araiicarias and Abictinece, but, so far, we have not been able 

 to find any references concerning the comparative structure between this genus 

 and Callitris, or other Australian genera. 



Macroscopically there is little resemblance between the timbers of the 

 Callitris and Araucarias, although the latter more approaches that of Agathis 

 than any other Australian genus. 



Microscopically the dilferences between llooj; Pine and Cci/lilris is marked, 

 especially so in the tangential and radial sections, although the disposition of the 

 bordered pits, and parenchymatous cells of llic medullary rays indicate an affinity 

 with Agathis. 



C. E. Bertrand has carried out .some aiiatDuiical work 011 the Aiunicarios 

 in general, but more particularly on non-Australian, although this sj^ries recei\-e<l 



