— iog — 



to 285°) contained 5,4% oxygen, and had the specific rotation 

 [a] D -j- 42,21° (determined in 3,9 per cent, alcoholic solution). 



2. Leioscyphus Taylori Hook. This moss dried at ioo° and pulver- 

 ised, yielded 1,6 °/ viscid, blue-green, essential oil with a very intense, 

 persistent, peculiar odour, and a. very unpleasant taste; d2o° 0,978 

 and 0,986; [«]p — 3,44° (determined in 9,03 per cent, alcoholic solution); 

 saponification number 11,4. The analyses of the fraction of the boiling 

 point 260 to 265°, d 0,937, [«]d — 22 (?) agreed with a sesquiterpene 

 alcohol C 15 H 26 0. The fraction of the boiling point 265 to 278° 

 appears to contain a terpene C 15 H 24 . The fraction of the boiling 

 point 280° to 290° (Wwhite-j- 26,88°) contains a sesquiterpene alcohol 

 C 15 H 26 0. Solid benzoyl compounds could not be obtained from 

 either alcohol. 



3. Madotheca levigota Schrad. The moss dried in the air yielded o,9°/ 

 of a comparatively mobile, orange - yellow oil with a pleasant odour; 

 di6° 0,856; [«]d-(- 72,74°; saponification number 5,56. The pepper- 

 mint-like taste of the moss does not originate from the essential oil. 

 The fraction of the boiling point, 150 to 160° (17 mm. pressure) 

 ^150 0,968, Mr>-[ 132,23°, boils at atmospheric pressure with decom- 

 position at 280°, and contains an alcohol C 10 H 18 O. 



4. Alicularia scalaris Corda. The oil of this hepatica is lemon-yellow, 

 and reminds in the odour of the fragrance of the forest; diso 0,965; 

 Wd — 33,49°- 



Hydrocarbons. 



Myrcene, Ocimene. The number of the olefinic terpenes which 

 have become known up to the present is but small. The member of 

 this class first described in the year 1891, the artificially produced 

 anhydrogeraniol of Semmler, has not been examined further; but 

 there are numerous communications in existence dealing with the two 

 olefinic terpenes myrcene and ocimene which occur naturally. 



Enklaar 1 ) has set himself the task of clearing up the relationship 

 between these two bodies. The ocimene was produced from the leaves 

 of Ocimum basilicum L., in a yield of 0,37%, and obtained by suitable 

 treatment as an oil of the specific gravity 0,8031, n Di8° 1,4857. The 

 myrcene, which we had placed at the author's disposal for the purpose 

 of this examination, had after purification d^o 0,8013, n Di9o 1,4700. 

 Whilst ocimene, under unfavourable conditions, hardly changed after 

 4 years, myrcene had almost entirely become resinified after 2 years, 

 in spite of the fact that light and air had been excluded. The two 

 terpenes, which were beyond doubt identified as different substances, 



*) Over Ocimen en Myrceen, eene bijdrage tot de kennis van de aliphatische 

 terpenen. Thesis, Utrecht, 1905. 



