176 



ff C. = 0-8563, and the refractive index at ig° C. = 1-4755. The saponilicatiou 

 number was 13-57, ^qual to 4-75 per cent, of ester. It was evidently a terpene 

 oil, and was but little soluble in alcohol. 





Cm 



de Oil from the Leaves of Callitris intratropica. 





No. 



Localit>' and Date 



Specific Gravity ° C Rotation n^ 



Refractive 

 Index ° C. 



Ester per cent 



Yield per cent. 



I. 



Port Darwin. 



2 II 04 



! 

 O.S481 @ 22 -21-6 1-4768(0! 22 



3-8i 



O-II 



2. 



Port Darwan, 

 29 12 03 



0.8563 @ 23 



1-4755 @ 19 475 





III. TIMBER. 



(a) Economic. 



This timber is the darkest coloured of all the Callitris, a character due to 

 the presence of the manganese compound, as well as a large percentage of oil and 

 a phenol — a circumstance that, no doubt, makes it one of the best white-ant- 

 resisting species of the whole genus, but at the same time would materially bar 

 it from use for furniture and other like purposes to which the timbers of its con- 

 geners are put. This one feature alone should make it worth while cultivating in 

 forest lands, as in time its timber would be invaluable for railway sleepers in ant- 

 infested districts. 



It is in great request in the Port Darwin district, and the authorities of 

 that Territory despatch from time to time search parties to locate it, with a result 

 that a large area carrying this valuable pine in sparse quantities, has been dis- 

 covered in the vicinity of Cape Shields, and it is now thought that ample timber 

 for many years to come may be had by systematic operations. 



(b) Anatomy. 



In the various sections examined, the salient features of distinction from 

 other species, were the slender walls of the tracheids, and those of the parenchy- 

 matous cells of the medullary rays, and also the height of these, which some- 

 times contain as many as fifty rows. 



The tracheids of the autuiniuil wood are comjircsscd concentrically, (he 

 outer ones especially so, and show no gradation of size into the s])ring wood, (he 

 larger cells of the latter commencing immediately after the former. 



