— 70 — I 



designation "Champacol" of the body in question is without any real 

 foundation; on the contrary, the only proper designation is that of guajol. 

 Emmanuel's ladaniol, it would seem, corresponds with the last-named body. 



Lagam Oil. Up to the present it has been held that one of the con- 

 stituents of lagam oil was a sesquiterpene of which the hydrochloride had 

 m. p. 114 01 ), but only recently an investigation conducted by L van Itallie 

 and M. Kerbosch 2 ) has disclosed further particulars with regard to the 

 constitution of the oil. These authors examined two kinds of lagam 

 balsam, one liquid, the other of elemi-like consistency. The liquid variety, 

 alleged to be derived from Canarium eupteron, Miq. (N. O. Amyridaceae) 

 appears in fact to be the product of a dipterocarp. The liquid balsam 

 contained 49 p. c. colourless essential oil, which was found to possess 

 the following constants: d^ 0,9051, « D — 7,5°, n D24C 1,4972. More than 

 93 p. c. passed over between 258 and 261°; the rectified oil possessed the 

 following properties: b. p. 261 to 263°, dg| 0,905, « D — 7,46°, n D16l50 1,49935. 

 These constants led to the assumption that the oil consisted of caryophyllene ; 

 but as a matter of fact it yielded both the caryophyllene alcohol (m. p. 92 to 

 94°) and the blue nitrosite, m. p. Ill to 112°. 



The solid variety of lagam balsam is derived from Dipterocarpus 

 Hasseltii, Bl. or from D. trinervis, Bl., two closely allied, and possibly 

 identical, dipterocarps. By steam-distillation the authors obtained from 

 this balsam 10,5 to 22 p.c. essential oil, possessing the following constants: 

 d§§ 0,9065, oc D — 8,9°, n D16)50 1,50029. This oil also consisted of caryophyllene 

 (m. p. of the nitrosite 112 to 113°). 



Larch Turpentine Oil, see Turpentine Oil, p. 111. 



Lavender Oil. The forecast with respect to this article given in our 

 last Report has been realised; throughout the summer the prices have 

 been well maintained. All parcels of really good quality had passed into 

 firm hands as early as the spring and for inferior qualities also the pro- 

 ducers were able to command very stiff rates indeed. The favourable 

 prospects for the present year's crop might possibly have contributed to 

 a weakening of the market during the summer, for the reports were 

 thoroughly favourable, but only small stocks remained to meet the fairly 

 sustained demand and everybody interested was looking forward eagerly 

 to the arrival of the new oil. Distilling commenced under favourable 

 auspices, but rain and cool weather set in shortly afterwards, and as a 

 result of these conditions the oil-yield turned out to be poor. The pro- 

 ducers were only too ready to take advantage of these circumstances to 

 show a firmer front, the more so because certain buyers, without any 

 apparent reason, paid such inflated prices for the new flowers that the 



!) Haussner, Arch, der Pharm. 221 (1883), 245. 

 2 ) Ibidem 250 (1912), 199. 



