- 76 - 



he does not consider the former as probable. Finally, the presence 

 of camphene in the higher pinene fractions may also be thought of. 



O. Aschan 1 ) fractionated the turpentine each from Pinus sil- 

 vestris L. and from Pinus Abies L.; both passed over below 180 

 with the exception of a very small residue. The semi -liquid tur- 

 pentine from P. silvestris yielded 9,2 °/ terpenes, the somewhat harder 

 turpentine from P. abies (pine resin) only 4,5 °/ . The fractions ob- 

 tained from these oils also point to this, that in the lower boiling 

 portions other terpenes, besides pinene, must be present. The pre- 

 sence of a 1-pinene in the balsam of Pinus abies L. has now 

 been proved by Aschan's experiments, whilst the d-pinene, as already 

 detected before, originates from Finnish, Swedish, and most probably 

 also Russian turpentine oils from Pinus silvestris L. Furthermore, syl- 

 vestrene was detected with certainty in the balsam of Pinus silvestris L. 

 Aschan believes, on the strength of the greatly increasing laevorotation 

 of the higher fractions of the turpentine oil from Pinus abies, 

 that a comparatively large content of 1-limonene may be accepted, 

 which occurs as dipentene dihydrochloride when hydrochloric acid is 

 added. The detection of sylvestrene is all the more interesting to us, 

 as we had already discovered this hydrocarbon before in German oil 

 from the needles of Pinus silvestris?) 



With regard to Swedish turpentine oil, I. Kondakow and 

 J. Schindelmeiser 3 ) communicate the following: the dextorotatory 

 oil gave a fraction of the b. p. 153 to 160 (a D -|~ 22° 28'), one of 

 the b. p. 185 to 190 (« D -j-io°2o') J and a small residue. There 

 was present in the oil, in addition to sylvestrene and dipentene, a 

 hydrocarbon of the b. p. 174 to 176 («d±o°; d l9 o 0,854; n D 1,49013), 

 which could not be made to combine with hydrochloric acid, and 

 on oxidation with permanganate yielded oxyisopropylbenzoic acid 

 (m. p. 1 55 ). As moreover cymene sulphonic acid was identified by 

 its barium salt, the hydrocarbon had to be considered as p-cymene. 

 From the same oil a not yet identified hydrocarbon of the b. p. 145 

 was also fractionated off. 



Mokievsky 4 ) has made a study of the products of decomposition 

 of turpentine oil which are formed during the heating in a sealed 

 tube. The oil was heated to a very high temperature in the closed 



*) Berl. Berichte 39 (1906), 1447 and 2596. 



2 ) J. Bertram and H. Walbaum, Arch, der Pharm. 231 (1893), 290. 



3 ) Chem.-Ztg. 30 (1906), 722. 



4 ) Journ. russ. phys. chem. Ges. 36, 913. Ace. to Chemist and Druggist 68 

 (1906), 617. 



