The so-called Jura turpentine is obtained in the Swiss jura from Picea excelsa, Lk. (Pinus Picea, Duroi, Picea vulgaris, Lk., Ger. Rottanne or Rotfichte)5). The fresh oleoresin yields readily upon distillation with water vapor 32 to 33 p. c. of oil, about the properties of which nothing is known.
From a turpentine obtained from the same species in the neighborhood of Naples, 18,3 p. c. of an oil were obtained. The sp. gr. was 0,866; aD + 3°5' at 18°; S. V. 0. The oil possessed a delicate odor of pine needle oil1).
1) Pharm. Zentralh. 47 (1906), 866.
2) Philippine Journ. of Sc. 4 (1909), A, 231.
3) See p. 62 under American turpentine oil.
4) B. T. Brooks, Philippine Journ. of Sc. 5 (1910), A, 229.
5) Fluckiger, Schweiz. Wochenschr. f. Chem. u. Pharm. 13 (1875), 371. - A. Tschirch and E. Bruning. Arch, der Pharm. 238 (1900), 616.
From a turpentine from Siebenburgen (possibly a variety of this species), A. Tschirch and M. Koch2) obtained 30 p. c. of a volatile oil, the sp. gr. of which was 0,870 and which boiled between 175 and 180°.
The oil best examined is that from Finland. O. Aschan3) obtained a yield of 4,5 p.c. Fraction 155 to 160° (d 0,8657; [a]D- 7,87°) yielded a chlorhydrate that melted at 125 to 126° ([a]D - 9,15°), also a nitrosochloride (m. p. 113 to 114°), which was converted by the well-known method into nitrosopinene melting at 132 to 133°. Hence the fraction contains /-a-pinene. Fractions 168 to 173° (aD - 19°20') and 173 to 178° (aD - 23°28'), when treated in ether solution with hydrogen chloride yielded dipentene dihydrochloride (m. p. 50°). Hence they contained /-limonene. Sylvestrene could not be detected.
Upon distillation with water vapor B. Kuriloff4) obtained 7,8 p.c. of oil. d20o0,8635; aD - 11,96°. The fraction boiling up to 176,7° (772 mm) (aD - 40,7°) yielded a dichlorhydrate melting at 48,5°, hence contained /-limonene (l-isoterpene).
Although probable that this report pertains to Picea excelsa, it is not definitely established. The title reads: "Untersuchung der Terpene des OIs aus dem Tannenharze (Pinus Abies)". The author's name, which is of such importance especially in connection with this species, is wanting. Pinus Abies, Duroi is the Edeltanne, wheras Pinus Abies, L. is the Rottanne.