— 49 — 



addition to decylic aldehyde, other easily changeable aldehydes appear 

 to be present. The geraniol, obtained in the pure form by means 

 of the calcium chloride compound, showed the constants which per- 

 tain to this alcohol: b. p. 231 to 23 2 , d i5 o 0,881, «d±o. It 

 yielded a diphenyl urethane, m. p. 80 to 8i°. The borneol which was 

 isolated was faintly lsevorotatory ; it crystallised from petroleum ether 

 in hexagonal tables, m. p. 2 04°, and upon oxidation it yielded camphor, 

 of which the oxime melted at 1 1 8°. In the saponification liquor 

 which had been used for decomposing the ester-fractions, acetic acid 

 and a little decylic acid were found present. 



To sum up: the following bodies are now known as constituents 

 of coriander oil, viz., 



d-a-pinene, i-a-pinene, /?-pinene, phellandrene (?), cymene, dipentene, 

 a-terpinene, ^-terpinene, terpinolene(P), n-decylic aldehyde, d-linalool, 

 geraniol, 1-borneol and acetic esters of these alcohols. 



Cubeb Oil is very firm, cubebs being extraordinarily scarce and dear. 

 We have repeatedly been compelled to advance the prices of our distillate. 



Cumin Oil. The arrivals of the present season's seed, which 

 have been so ardently expected, are now to hand, so that for the 

 present there is again a supply of this oil, and we have been able 

 to lower our prices in consequence. 



Investigations into the constitution of cumin oil 1 ) [Cuminum Cymi- 

 num L., N. O. Umbelliferae) were begun as far back as the year 1841, 

 and led to the result that cuminic aldehyde was found to be the principal 

 constituent of the oil. In addition to the aldehyde, the oil is said to 

 contain cymene and aterpene C 10 H 16 , called by Wolpian hydrocuminene. 



The oil examined by us possessed the following constants: b.p. 165 

 to 280 (754 mm.), di 5 o 0,921, « D -f- 4 °2o', n D20 o 1,50784. The 

 hydrocarbons were separated from the fractions with higher boiling points 

 by fractionation in vacuo. The fractions possessing a b. p. of over 

 8o° (10 mm.) were shaken up with bisulphite, only small portions 

 being left unaffected by this reagent. The examination, therefore, fell 

 under the following heads: — 



I. The hydrocarbon fraction. 

 II. The products reacting with bisulphite. 



III. The portions not reacting with bisulphite. 



I. The Hydrocarbons. 



The hydrocarbons were again fractionated several times at ordi- 

 nary pressure. As the b. p. rose, the rotation fell considerably; for 



x ) Gildemeister and Hoffmann, The Volatile Oils, p. 545 ff. 



