— 92 — 



it is most probably present. The thiosemicarbazone had no uniform m. p., 

 as it was impossible to remove the small quantities of furfural which * 

 were present. 



The cohobation-oil, when freed from its aldehydes, contained, in 

 addition to methylheptenol (Report October 1911, 60), cineole, which we 

 identified from its iodol-compound, m. p. 110 to 111° and its constants; 

 and dipentene, of which the dihydrochloride melted between 47 and 48° 

 and the tetrabromide between 124 and 125°. The cineole-content of the 

 first runnings varied between 30 to 40°/ . 



In addition to cineole and dipentene, the first runnings appears to 

 contain an aliphatic terpene. It was impossible to isolate this body by 

 fractionation; by acting upon it with glacial acetic and sulphuric acids we 

 obtained a yield of about 10% of an ester of which the alcohol, after 

 saponification, melted between 210 and 215°, and had di 50 0,915. This 

 alcohol resinified very readily; its odour reminded both of linalool and 

 of terpineol. As the fraction with m. p. 168 to 170°, which had been 

 used for hydration, contained no sabinene, camphene, fenchene, or pinene, 

 the surmise that the alcohol has been generated from an aliphatic terpene 

 is probably not quite unfounded. 



The observations recorded above are in agreement with the detection 

 in Mexican linaloe oil of an olefinic terpene, announced by us a few years 

 ago (Report April 1909, 67). It is highly probable that this body is iden- 

 tical with myrcene. 



In our Report of October 1910 (pp. 26 and 79) we mentioned that a 

 so-called linaloe oil had recently been prepared in Formosa. We have 

 since learnt from the Chemiker-Zeitung 1 ) that a licence for preparing this 

 oil has been granted to the firm of Mitsui Bussan Kaisha, who hope to 

 distil 300 kilos of the oil before March 31 st of this year. No further news 

 has been received regarding the botanical origin of the product. 



We believe the oil to be probably identical with apopin oil (described 

 in our Reports of October 1903, 10 and April 1904, 10) or with a fraction 

 of that oil. 



On the preparation of dihydrolinalool from methylheptenone of various 

 origin, see p. 177. 



Oil of Magnolia glauca. The leaves of this North American shrub 

 (Magnolia glauca, L.; N. O. Magnoliaceas) contain, according to a con| 

 munication by F. Rabak 2 ) 0,05% of a pale-yellow essential oil: d 25 o 0,9240, 

 Md + 3,96°, n D250 1,4992, acid v. 1,8, ester v. 13, ester v. after acet. 28, 

 gives a cloudy solution in 3 x /2 vols. 90% alcohol, insoluble in 80% alcohol. 



*) Chem. Ztg. 36 (1912), 89. 



2 ) Midland Drugg. and pharm. Review 45 (1911), 486. 



