— 28 — 



nated crystallisation was 115 to 116° and 121 to 122°. In the middle of 

 summer the oil contains more 1-limonene than in the winter, a phenomenon 

 which was also observed in the case of oils from other species of Callitris. 

 The oil appears furthermore to contain small proportions of bornyl and 

 geranyl acetate. 



Oil of Callitris intratropica , Benth. et Hook. (Syn.: Frenela intratro- 

 pica, F. v. Muell.; F. robusta, A. Cunn. var. microcarpa, Benth.) This species 

 appears to be restricted to the Northern part of Australia and to the 

 North -West Coast. Like the preceding species, this is also known as 

 "Cypress Pine". The oil from the leaves was distilled in November 

 (yield 0,11°/ ): d 22 o 0,8481 to 0,8570, « D — 21,6°, n D18 o 1,4768, ester content 

 3,81 to 4,75%, calc. as ester CH 3 COOC 10 H 17 , insoluble in 10 vols. 90% 

 alcohol. In oil which had been exhaustively fractionated the following 

 constituents were found to be present: «-pinene, 1-limonene, dipentene, 

 borneol, and geraniol, the last-named two probably in the form of acetates. 

 The oil consisted almost entirely of terpenes. 



Oil of Callitris gracilis, R. T. Baker. This species, called "Cypress" 

 or "Mountain Pine", is only known to occur in the neighbourhood of 

 Rylstone, New South Wales. Distillation of the leaves yielded 0,723% 

 essential oil, possessing the following properties: d§^ 0,8683, « D + 8,7°, 

 nD2oo 1,4752, ester content 12,1%, calc. as ester CH 3 COOCi Hi 7 , soluble 

 in 10 vols. 90% alcohol. After repeated distillation the oil was found to 

 contain the following constituents: d-«-pinene (m. p. of the nitrosochloride 

 107 to 108°; m. p. of the nitrosopinene 131 to 132°), 1-limonene, d-bornyl- 

 acetate and very probably «-terpineol (proved by shaking with hydriodic 

 acid, by which reaction dipentene dihydriodide, m. p. 78°, was most prob- 

 ably formed), apparently as a butyrate. As regards acids, acetic and 

 butyric acid were found present in the saponification liquors. The oil also 

 most probably contained geraniol as well as a phenol allied with callitrol. 



Oil of Callitris calcarata , R. Br. (Syn. : C. sphceroidalis , Slotsky ; 

 C.fruticosa, R. Br.; Frenela calcarata, A. Cunn.; F. Endlicheri, Parlat.; F. fru- 

 ticosa, Endl.; F. pyramidalis, A. Cunn.; F. ericoides, Hort.; F. australis, Endl.; 

 Cupressus australis, Persoon; Juniperus ericoides, Noisette). This species, 

 which is known as "Black", "Red", or "Mountain - Pine" is widely distri- 

 buted over the Eastern States of Australia. The oil from the leaves 

 (yield 0,162% in April, 0,168% in March) gave: d 17 o 0,8863*) to 0,8949, 

 « D — 4,5° to + 11,7°, n D190 1,4747 to 1,4760, ester content hot 38,6 to 46,58% 

 cold 27,08 to 39,4%, calculated as ester CH 3 COOCi Hi 7 . The oil was 

 soluble in its own vol. of 80% alcohol, when more was added cloudiness 

 ensued. After thorough and careful fractionation the principal constituents 

 of the oil were found to be geranyl acetate together with d-bornyl acetate ; 

 as regards acids, the saponification-liquors were found to contain, besides 



!) Recalculated to 17°. 



