284 



The Li mone)ic.— The second fraction of the first distillation was again 

 distilled, and 12 c.c. obtained boiling between 170° and 177° C. This had specific 

 gravity at 22° C. = 0-8381; rotation, Ui, — + 63-6°; and a refractive index at 

 20° C. = 1-476. It consisted mostly of linionene, as it gave the characteristic 

 bromide for that substance; but as this melted at 117-118° C. evidently some 

 dipentene was present ; it thus agrees with the oils of the Callitn's generally-. The 

 fourth fraction of the first distillation was again distilled, and 5 c.c. boiling between 

 270° and 280° C. separated. This had specific gra\dty at 22° C. = 0-9203, and 

 refractive index at the same temperature = 1-5052. It gave the colour reaction 

 for cadinene when dissolved in chloroform and treated with sulphuric acid, and 

 the physical properties appear to indicate that sesquiterpene, but we were not 

 successful in preparing the crystallised dihydrochloride \\ith it. 



Crude Oil from the Leaves of Callitris Maclcayana. 



Locality and 

 Date 



Specific 

 Gravity ° C". 



o-8484@20 



Rotation a 



+ 4^-5 



Refractive Ester per c?nt. 

 index " C l>y boiling. 



Ester per cent, 

 in the cold. 



Yield 

 per cent. 



Coolongolook. 

 II 10 07 



1-4791 



3-5 



3-^ 



0-172 







IV 



TIMBER. 









{a) Economic. 



This tree is found on le\-el ground in rich scrub soil as well as on steep 

 sides of ridges. It attains a general height of from 60 to 80 feet, and a diameter 

 of about 2 feet ; the trunk being for a great length without any branches, 

 makes the tree appear different from the usual aspect of Callitris. The bark is 

 very thick and fibrous, and a rich reddish-brown colour, differing in these respects 

 from those of C . glauca and other Callitris. 



The timber may be said to be entirely free from figure, the grain being 

 quite straight, but, nevertheless, when planed it has a nice pale colour. Unfor- 

 tunately it is a rare tree, occurring only in patches in the northern coast district, 

 and, so far as known, only in a comparatively few localities in New South Wales 

 [supra . It has a very light brown-coloured duramen and is fissile, easily worked, 

 and much resembling the '' Brown or Damson Pine," Podocarpus data, R.Br., in 

 texture and colour, and could be used for cabinet work, panelling, &c. It is only 

 slightly aromatic compared to those of its cognate species of Callitris. Con- 

 cerning its ant-resistant properties there are no data available, but it probablv 

 possesses some of thes2 qualities, for Mr. A. B. Barlow of ^'arrahappini lias 

 fo^^va^ded to us a specimen which has lain on the ground for nineteen years and 

 is still in a good state of preservation — a rather good record of durability. 



