82 Report of Schimmel 8j Co. 1921. 



oil of this plant already years ago 1 ); but we were then only able to ascertain as 

 regards its botany that, according to Parry and Bennett a similar product, known as 

 thyme lemon oil, was supposed to come from Lippia citriodora, Kth. We questioned 

 this statement already at that time, and the researches of Dorronsoro have now proved 

 that the oil in question did not come from a verbena, but from Thymus hirtus. The 

 sample of this oil from the year 1915 which Dorronsoro studied, was brown, trans- 

 parent, smelled of oil of lemon and had the following constants: — di 5 o 0.909; 

 « D15 o + 13° 20'; n D15 o 1.4825; soluble in 90 per cent, alcohol, soluble in 2 vol. 80 per cent, 

 alcohol and in 7 vol. 70 per cent, alcohol; acid v. 4.2; ester v. 18.34; ester v. after 

 acetyl. 95.35; ester (acetate of an alcohol Ci Hi 8 O) 6.42 per cent.; total alcohol (Ci Hi 8 O) 

 28.35 per cent.; free alcohol 22.52 percent.; citral contents (bisulphite method) 6.6 per cent, 

 (hydroxylamine method) 12.54 per cent, (by weight). In the Ladenburg flask: — 155 to 

 173°, 9.05 per cent.; 173 to 180°, 9.80 per cent.; 180 to 190°, 18 per cent.; 190 to 200°, 

 19.11 per cent.; 200 to 210°, 23.25 per cent.; 210 to 220°, 8.92 per cent.; 220 to 225°, 

 6.5 per cent; residue 5.82 per cent. The first two fractions probably contained d-limonene 

 (20 to 25 per cent, b. p. 175 to 176°, d 15 o 0.850), the fraction 190 to 220° probably 

 linalool and chiefly d-fenchone (semicarbazone m. p. 176 to 178°). Dorronsoro con- 

 siders on the strength . of his investigations, though they are not completed yet, that 

 the oil has the following compositions: — terpenes (limonene) 20 to 25 per cent; citral 

 12.54 per cent; ester (acetate of an alcohol Ci Hi 8 O) 6.50 per cent; free alcohol Ci Hi 8 O 

 22.60 per cent; fenchone, resins 8jc. 33.36 per cent. 



Two yellowish, almost colourless oils of the cultivated Marjoram (Origanum 

 Majorana, L), from Malaga and Sevilla had the following constants: — di 5 o 0,8956 to 

 0.8601; a D20 o + 17°12' and +10° 26'; n D20O 1,4744 and 1.4787; acid v. 1.84 and 1.3; 

 ester v. 30.70 and 8.63; ester v. after acetyl. 62.67 and 68.94; ester (terpinyl acetate) 

 10.75 and 3.02 per cent; total terpineol 18.07 and 19.9 per cent; free terpineol 9.0 and 

 17.37; soluble in any proportion in 90 per cent alcohol, in 1.7 vol. (with 5 vol. more, 

 turbidity) and in 1.5 vol. (with 3 vol. more, turbidity) 80 per cent, alcohol; ketone 

 contents (hydroxylamine method) 9.26 and 6.9 per cent., (bisulphite method) 8 per cent. 



A Melissa Oil (Melissa officinalis. L.) from Sevilla had the following properties: — 

 d 2 5o 0.8910; «D22oH-2°8'; n D220 1.4704; soluble in 0.5 vol. 90 per cent, and in 2 vol. 

 80 per cent, alcohol (slight turbidity with more); acid v. 2.2; ester v. 27.42; ester v. 

 after acetyl. 236.28; aldehydes (bisulphite method) 42 per cent. 



Three Verbena Oils from Sevilla, Malaga and Valencia, from Lippia citriodora. H. B. 

 et r\. (Verbena triphylla, L, Aloysia citriodora, Ort. [Yerba LuisaJ), were of a golden- 

 yellow colour and smelled more or less strongly of lemon oil. The Malaga oil which 

 was distinguished by its high rotation, « D22 o + 15°52', had a penetrating smell reminding 

 of camphor. The constants were: — di 5 o 0.9059, 0.9060, 0.8820; « D220 + 1° 28', + 15° 52', 

 + 0°; n D22 o 1.4778, 1.4802, 1.4835; soluble in any proportion in 95 per cent alcohol and in 

 90 per cent, alcohol; in 0.3 vol., in 1 vol. (with more, turbidity) 90 per cent alcohol, 

 in 1 vol., in 1.8 vol. (with more, turbidity); insoluble in 14 vol. 80 per cent, alcohol. 

 Aldehyde contents (sulphite method) 40 p. c, 30 p. c, 68 p. c; (hydroxylamine method) 

 — , 37.7 p.c, 66.5 p. c; acid v. 6.17, 2.71, 1.5; ester v. 43.17, 16.31, 10,49; ester (geranyl- 

 acetate) 15.09 p.c, 5.71 p.c, 3.67 p.c; ester v. after acetyl. 185.77, 156.80, 205.8; total 

 alcohol 51.95 p.c, 48.80 p.c, 66.84 p.c; free alcohol 39.42 p.c, 43.15 p.c, 62.90 p.c. 



An oil obtained from cultivated Wormwood from Malaga was intense greenish-blue, 

 opaque, had the sharp smell of the plant and tasted bitter and of camphor (thujone?): — 





; ) Report April 1907, 101. 



