277 



go per cent, alcohol. The specific gravity of the crude oil at i6° C. =0-8735; 

 rotation rt,, = + 38-1°; refractive index at 16° C. = 1-4783. The saponification 

 number, after boiling, was 17-3, equal to 6-05 per cent, esters. In the cold, 

 with two hours' contact, the saponification number was 15-9, equal to 5-6 per 

 cent. It was thus seen that the greater portion of the esters was saponified in the 

 cold, and the separated oil had a secondary odour of geraniol. Only 40 c.c. of the oil 

 could be spared for redistillation. Between 154° and 160°, 67 per cent, distilled; 

 between 160° and 170°, 13 per cent.; between 170° and 200°, 7 per cent; 

 between 200° and 250°, 8 per cent. The specific gravity of the first fraction at 

 H° C. = 0-8583; of the second, 0-8583; of the third, 0-8656; of the fourth, o-gi6. 

 The rotation of the first fraction ao = + 40-7°, or a specific rotation [a]^ — + 

 47-42°, which is nearly as high as the specific rotation of the pinene of C. 

 Drummondii. The rotation of the second fraction fl„ = +38-5°; of the third, 

 + 33'i° ; of the fourth, + 19-9°. The refractive indices of the first three fractions 

 at 20° C. also closely agreed — the first 

 third = I -475 1. 



I "4733 ; the second = i"4736 ; the 



The above results show that the oil consisted largely of dextro-rotatory 

 pinene, and that the indications for limonene were not strongly marked. The 

 first fraction was again distilled, and that portion which came over between 

 155-156° C. was separated. The nitrosochloride was prepared from this in 

 the usual way. The oil of this species shows distinctive characters from those 

 of any other species of Callitris, and although having resemblances in composition 

 in some respects to the oil of C. Muelleri, yet, it can be seen that the two oils are 

 distinct. 





Crude Oil from the Leaves of Callitris ohlonga. 





Locality and 

 Date. 



Specific 

 Gravity ° C. 



flotation n^ 



Refractive 

 Index ° C 



Ester by 

 boiling, 

 per cent. 



Ester 1 ,T- , , 

 in the cold, ^'''^^■ 

 per cent. P^^ ^'''^■ 



Avoca, Tasmania. 

 26,6/08 



0-8735 @ 16 



+ 38-1 



1-4783 @ 16 



6-05 



5-6 



0-054 



IV. TIMBER. 



{a) Economic. 

 The economics of the timber are quite limited owing to its small size. 



