— 47 — 



The observations which we have already repeatedly made pre- 

 viously 1 ) that there are also dextrorotatory linaloe oils of otherwise 

 good quality, has recently been confirmed from various sides. For 

 example, E.J. Parry and C. T. Bennett 2 ) have observed in two oils 

 a dextrorotation of -J- 2° 30' and -f- 4°, whilst those determined by 

 us were -f- 2° 54', -f-6°3 / , -~j-7°3i', and even -(-8°. We also at 

 the time called attention to the fact that the d-linalool isolated by us 

 from the dextrorotatory oils, had been included in our lists. We there- 

 fore need only refer to the above statements. Parry and Bennett 3 ) 

 further found in oils from a reliable source, an extraordinary high ester- 

 content (n,2°/ ) with a corresponding low linalool- content (57%); 

 in this case the rotation was — 13 . Apart from the fact that we 

 also had found similar results in oils which otherwise were unobjec- 

 tionable, H. Simmons 4 ) also confirms this as well as the former state- 

 ments. He found on the one hand in an oil a rotation of -f- 5 14', 

 and on the other hand ester-contents of 6,29 to 9,0 °/ . Yet W. Nau- 

 mann 5 ), who also quotes some results of analyses of linaloe oils, has 

 up to the present never observed a dextrorotation of these oils. An 

 explanation of the striking occurrence of dextrorotation is possibly given 

 by A. Birckenstock, whose work on rue oil, rosemary oil, and lav- 

 ender oil is quoted in these Reports 6 ). 



Oil of Myrrh. With reference to a work by A. Tschirch and 

 W. Bergmann 7 ) on Herabol myrrh, E. M.Holmes 8 ) expresses himself 

 somewhat as follows: The statement made by Tschirch, that Holmes, 

 while rejecting all the other mother - plants , wishes only to admit 

 Commiphora myrrha (Nees) Engl. {Balsamea myrrha Baill.), but not also 

 Bahamodendron myrrha Nees, as crude material for the production of 

 this drug, does not agree with the facts. Holmes refers to an earlier 

 work 9 ) in which he mentions exactly Bahamodendron myrrha Nees as 

 the mother -plant of the drug. Holmes also denies Tschirch's 

 assertion, that Holmes' objections to Schweinfurth's 10 ) statements 

 are based solely on the determination of the odour and taste. 



Neroli Oil. The rumours already mentioned in our last Report, 

 according to which one half of the orange-blossoms had been destroyed 



*) Report April 1904, 56; October 1905, 47. 



2 ) Chemist and Druggist 68 (1906), 544. 



3 ) loc. cit. 



4 ) Ibidem, 584. 

 6 ) Ibidem, 619. 



6 ) Comp. the present Report under the respective headings. 



7 ) Arch, der Pharm. 243 (1905), 641; Report April 1906, 46. 



8 ) Pharmaceutical Journal 76 (1906), 254. 



9 ) Ibidem 62 (1899), 27. 



10 ) Berichte d. deutsch. pharm. Ges. 3 (1893), 237. 



