Origin and Production. As in Greece, so in Algeria the Aleppo pine, Pinus halepensis, Mill, is used for the production of turpentine. Experiments made since 1905, have revealed that turpentine can be produced in Algeria as it is obtained in France from Pinus Pinaster, Sol. The number of Aleppo pines that can be used for this purpose is estimated at 20 or 30 millions, of which each can produce 11/2liters of turpentine annually4). In 1908 the government auctioned about 21000 trees in the department Constantine5) for this purpose, and in 19096) about 550 ha. of forest in the department of Oran.
Properties and Composition. Five samples of oil revealed the following constants7): d25o0,8552 to 0,8568; [a]D + 46,6 to + 47,6°; nD 1,4638 to 1,4652. When fractionated, 80 p. c. of the oil with the following properties distilled over between 155 and 156°: d26o,0,8541 to 0,8547; [a]D +47,4 to 48,4°; nD 1,4633 and 1,4639. With the exception of the density, these values agree well with those ascertained by Tsakalotos1) for Greek oil. As to density, they agree well with the values found by others for pure pinene. Hence about 4/5 of the oil may be regarded as consisting of pure d-pinene.
1) In the original the names of the botanical authors, of such great importance in connection with the Abietinae, are missing.
2) Abt. 30°o of the oil passed over between 155 to 156°: [a]d + 17°.
3) Die Harzungsversuche an der gemeinen Kiefer und der Fichte in PuBland und uber das Terpentinol aus dem Harze von Pinus silvestris, L Pharmaceutisches russisches Journ. 1912, Nos. 1 to 6.
4) Bull, de I'Office du Gouvern. de l'Algerie 13 (1907), 100.
5) Ibidem 14 (1908), 69.
6) Ibidem 15 (1909), 50.
7) Vezes, Bull. Soc. chim. IV. 5 (1909), 931.