4"4 



Tranverse Tests of Timber, Dacrydiion Franklini. 

 (Standard size, 38 in. x 3 in. x ; in.) 



Size of s{H.'cimen in inches 



Area of cross section, square inches ... 



Breaking load in lb. 



ModuliLs of rupture in lb. per square in. 



elasticity .. ,, 



Rate of load in lb. per minute 



-W 



No. 2. 



No. 



1 



' B 2-qj: D300 



K 



5 00; D 2-98 



B 



3 



00; D 3-00 



8-91 





8-94 







9 -00 



4-515 





4.350 







3,000 



q.I2I 





8.835 







6,000 



•2.445-283 





1,620,000 







1,270,588 



410 





290 







500 



(b) Anatomy. 



The most distinguishing characters of the wood are the fineness of the 

 wall structure of the various cells, a delicateness that differentiates it from any 

 other Australian Conifer. 



Another distinguishing feature is the almost entire absence of an}' cell 

 contents corresponding to those found in Callitris and in the Araucarias. 



The medullary rays have very long cells and all are parenchymatous, the 

 outer being of the same character as the inner, and the walls are exceedingly 

 slender. They are a few cells in height and one in width, there being an unusual 

 number of single-cell rays ; all are empty of the dark brown substance. The 

 large circular perforations are single to each lumen, and are exceptionally large. 



A few pitted cells were detected on the tangential walls, but those on the 

 radial walls are not too well defined, thus giving the idea of delicate bodies. 



The diameter- of the autumnal lumina are very small, although the walls 

 of the tracheids in this part are tlie thicker of the two seasons' growth, and 

 show outwardly a gradation of size and wall thickness from the extremities of 

 the combined seasons' ring. 



Figures 268-270 illustrate the above remarks. 



ic) ("he.mistry of THI-; Oil trom tiih Ti.mbek. 



The timber of this tree, which usually has a mild and somewhat pleasant 

 aromatic odour, was received from Tasmania. It was reduced to shavings by the 

 aid of a planing machine, and 67 lb., when distilled for nine hours, gave 

 6 oz. oil, equal to 0-56 per cent. The particular sample of wood iis< d was very 

 dry, and had comparatively little odour, so that under the most faxourable 

 conditions in this respect, more than i per cent, of oil sliould ]>r ohtiiiiird 



