— 63 — 



following physical constants: di 5 o 0,9338, « D +_0°, n D20o 1,50418. It was so- 

 luble in 4 vols. a. m. 70% alcohol, the dilute solution turning opalescent. 

 Treatment with 5% alkali liquor gave a phenol-content of 52°/o, the phenol 

 being identical with thymol. 



A fuller examination of the oil of Ocimum viride was published some 

 years ago by Goulding and Pelly 1 ). The plant itself is of some interest 

 in being a reputed prophylactic against mosquito-bites 2 ). 



Oil of (Enanthe crocata. From hemlock-dropwort or dead-tongue 

 ((EnarttJie crocata, L; N. O. Umbelliferas) an exceedingly poisonous plant 

 which is frequent in England, F. Tutin 3 ) has prepared an alcoholic extract 

 which, when distilled with steam, yielded 0,1 °/o (calc. on dry herb) of a 

 pale-yellow essential oil with a somewhat unpleasant odour. The oil gave 

 the following constants: dg| 0,9381, « D + 1°16' in a 25 mm. tube. It 

 boiled between 100 and 200° (100 mm.), the greater part passing over 

 between 180 and 200°. Furfurol was found to occur in the oil. 



Opopanax Oil. Newly-distilled oil is again in stock, and the price 

 remains cheap, as before. 



Origanum Oil, Cretan. From Dr. Giaconi, of Trieste, we received some- 

 time ago, together with a series of other oil-samples 4 ), three origanum oils 

 distilled by himself in the islands of Curzola and Lissa. In view of the 

 great diversity of origanum species it is a matter of importance to know 

 exactly what is the botanical origin of a sample, and Dr. Giaconi therefore, 

 at our request, procured for us also a sample of the distilling-material, for 

 which courtesy we here return him our best thanks. Dr. Giessler found 

 that the distilling-material was derived from Origanum hirtum, Lk. aalbiflorum. 

 Hassk. The table below enumerates the constants of the oils: 



| d 15 o 



a D 



n D2 oo 



Phenols 



Soluble in 



1. 



0,9400 



+ 0°20'(?) 



1,50436 



60% 



2,8 vols. a. m. 70% ale. 



2. 



0,9275 



+ 0°8'(?) 



1,50068 



57% 



1,3 vols. a. m. 80% ale. 



3. 



0,9231 



+ 0°6 f (?) 



1,49394 



51% 



1,5 vols. a.m. 80% ale. 



!) Proceed, chem. Soc. 24 (1908), 63; Bull. Imp. Inst. 6 (1908), 209; Report November 1908, 89. 



2 ) Comp. Report April 1904, 13. 



3 ) Pharmaceutical Journ. 87 (1911), 296. 



4 ) In addition to the above mentioned origanum oils, Dr. Giaconi sent us samples of 

 the following oils, distilled by himself: Oils of Calamintha Nepeta (24), Helichrysum angusti- 

 folium (54), and Satureja cuneifolia (109). Also oil of laurel leaves (56), myrtle (61), ros- 

 mary (78), sage (80), spike (85), wormwood (101), and oils of peppermint (69). The figures 

 in () denote the pages at which these oils are described in the present Report. 



