— 95 — 



Roure-Bertrand Fils 1 ) have prepared four different petitgrain oils from 

 the branches of the bitter orange, the sweet orange, the lemon, and the 

 mandarin-tree, and have found these oils to possess the constants given 

 below, which we record here as a matter of interest: 





Sweet 

 Orange 



Bitter 

 Orange 



Lemon 



Mandarine 



di5o 



0,8980 



0,8584 



0,8806 



1,0643 





« D . 



— 4° 20' 



+ 53° 52' 



+ 30° 44' 



+ 2° 20' 







Sap. v 



161,4 



12,5 



43,8 



265,0 



Ester v. after acet. . 



203,0 



47,4 



130,6 



— 



Solubility 



In 3,5 Vols. 

 70°/o Ale. 



In 0,5 Vols. 

 90°/o Ale. 



In 1 Vol. 

 85°/o Ale. 



In 1 Vol. 

 90°/o Ale, 



On the detection of foreign esters in petitgrain oil see p. 149. 



Oil of Pherosphaera Fitzgeraldi, F. v. M. 2 ) This conifer occurs in 

 the mountains of N. S. Wales. 



The oil, which was obtained to the extent of 0,1 08 °/ from the leaves, 

 distilled in February, was of a bright lemon yellow colour and possessed 

 the following constants: d|§0,8705, « D + 15,1°, n D23 o 1,4811, sap. v. 2,4 

 ■=0,84°/o ester CH 3 COOCi Hi 7 . The oil gave no clear solution with 

 10 vols, of 90% alcohol. When evaporated it left a residue which 

 congealed in a crystalline form. The principal constituents of the tho- 

 roughly fractionated oil were found to be terpenes; the presence of the 

 following being also determined: d-«-pinene (m. p. of the nitrosochloride 

 108°), cadinene (m. p. of the dihydrochloride 116°) and probably traces of 

 limonene or dipentene. The oil furthermore contains an aldehyde -like 

 body which the authors were unable to identify more closely. 



Oil of Phyllocladus rhomboidaliSj Rich. 3 ). This species, known 

 as "Celery Top Pine" occurs only in Tasmania. The leaves, or rather 

 the phylloclades, were distilled in July, yielding 0,215°/o essential oil: 

 d 160 0,8892, « D — 12,3°, n D16 o 1,4903, sap. v. 1,5. The oil dissolves badly 



*) Berichte von Roure-Bertrand Fi!s, October 1910, 42. With regard to petitgrain oils 

 prepared from different species of Citrus, comp. also Report April 1902, 79; April 1905, 65; 

 April 1910, 79. 



2) Baker and Smith, A Research on the Pines of Australia, Sydney 1910, p. 410. Also 

 comp. the present Report, p. 148. 



*). Baker and Smith i A research on the Pines of Australia, Sydney, 1910, p, 415. Also 

 comp. the present Report, p. 148. 



