— 27 — 



pentene. The limonene-, or dipentene-tetrabromide was obtained from a 

 fraction boiling at 170 to 180° (d 23 o 0,8624, « D + 51,7°). 



The oil also contains a small proportion of geranyl- and d-bornyl 

 acetate as well as a little free borneol, and, in addition, the same sesqui- 

 terpene which was discovered in the oil of Callitris robusta. 



Oil from the fruit: This oil, distilled in December (yield 0,44%) gave: 

 d 22O 0,8608, « D + 0,3°, n Dlfl0 1,4738, sap. v. 5,1 = 1,78% ester CH 3 COOC 10 H 17 . 



Oil of Callitris propinqua, R. Br. (Frenela Moorei, Pari.). This con- 

 ifer, called "Cypress Pine", is known as a native of New South Wales, 

 South Australia, and Kangaroo Island. The oil from the leaves, distilled in 

 May (yield 0,41%) gave: d^0,8662, « D +32,4°, n DWO 1,4752, sap. v. hot 34,88; 

 sap. v. cold 25,27. It does not make a clear solution with 10 vol. 90% 

 alcohol. An oil distilled from fruit-bearing branches (yield 0,326% in March) 

 gave d§| 0,8709, « D + 20,5°, n D19 o 1,4749, sap. v. 32,24. As regards its con- 

 stituents this oil is almost identical with that from Callitris glauca. 



Oil of Callitris glauca, R. Br. 1 ) (Syn. : C. Preissii, Miq.; C. Huegelii, 

 ined.; Frenela crassivalvis, Miq.; F. canescens, Parlat; F. Gulielmi, Parlat.) 

 This species, kown as "White", "Cypress" or "Murray River Pine" is 

 found throughout the Australian Continent, but always at some distance 

 from the coast. The oil from the leaves corresponds with the better 

 grades of commercial pine needle oils. It was prepared in a yield varying 

 from 0,532% in December to 0,635% in March, and possessed the follow- 

 ing constants: di 6O 0,8813, « D +27,9°, n D16 o 1,4771, ester-content, hot 13,82%, 

 cold 6,26%, calculated for ester CH 3 COOCi Hi 7 . Newly-distilled oil is 

 soluble in from 1 to 10 vols 90% alcohol; old oil is frequently insoluble 

 in 10 vols. 



The separate fractions of the oil were found to contain d-a-pinene 

 (m. p. of the nitrosopinene 132°), d-limonene (m. p. of the tetrabomide 

 116°) 2 ), dipentene, d-bornylacetate, and free d-borneol. The saponification 

 liquor contained acetic acid and possibly also butyric acid. 



Oil of Callitris arenosa, A. Cunn. (Syn.: Frenela robusta, A. Cunn. 

 var. microcarpa, Benth.; F. Moorei, Parlat; F. arenosa, A. Cunn.; F. micro- 

 carpa, A. Cunn.; F. columellaris, F. v. M.). This species occurs sporadically 

 in New South Wales as well as in Queensland and, in common with 

 many other Callistris- species, goes by the name of "Cypress Pine". The 

 oil from the leaves, of which the yield was from 0,249 % (in January) to 

 0,402% (in September) possessed the following constants: d 2 3o 0,8491, 

 « D + 35,8°, n D230 1,4760 and d 260 0,8452, « D + 18,9°, n D26 o 1,4764. It is of 

 a pale lemon-yellow colour and is insoluble in 10 times its volume of 

 90% alcohol. Upon fractionation it proved to contain about 85% of d- and 

 1-limonene and dipentene. The m. p. of the tetrabromide under fractio- 



x ) Report April 1909, 80. 



2 ) From the high m. p. of the limonene tetrabromide the authors conclude that in this 

 oil, as in the other varieties, dipentene is present. 



