46 
si OF Paul?) published an article on fossile resins, in 1 which he dist 
and composition of these intricate bodies. However, as it does n he 
being curtailed, we refer our readers to the original. | 
particulars as to the native production of resin. As they will interest’ pis a ‘imited et 
number of our readers, we mention the article for the sake of completeness, ‘witho 
going. into details. For previous communications on the subject, we beg to refer to 4 
our Reports of October 1915, 37; October 1916, 52; October 1917, 62. — | 
At the same time, we would call attention to a collection of ariieles by C. vonTubeut®). ; 
on‘the present state and the prospects ‘of the production of resin and to allied Palle ‘& 
cations by Miinch*), Gundel®), Auerochs®), Koehl?), mare and res ve 
As to the optical rotation of the turpentine oil of the ee pine, see page at a 
of this Report. . in 
An unexpected demand predominates for so-called Swedish oil of turpentine, ~ 
whether crude or pure, whether obtained by dry distillation or by the sulphite process, — 
in consequence of there being no imports of American turpentine oil. The active trade q 
thus created makes it necessary to have an adequate method of analyzing the crude . * 
oils, for which reason J. Klinga‘®) compiled a review of all existing tests. The following ~ 
way is ‘the most suitable: 150 c. c. of the crude oil are distilled from a short-necked e 
vessel, provided with a fractionating tube according to Young and connected with a © 
Fagerlind condenser, the distillate being collected in a graduated cylinder. Giving due : 
attention to a uniform rate of distillation and protecting the apparatus against draught, y 
the oil is separated into a first fraction up to 150°-and a second fraction from. 150 s 
to 180°. The distillation is interrupted at 180°. The rate of distilling is 3 to 4c. Coe 
per minute. The second fraction is then shaken with a 10 percent. sodium lye and — 
the reduction of volume ascertained. The volume of the part insoluble in sodium lye - 
may then, with sufficient exactitude for most requirements, be designated as PrOpaN. * 
tional with the content of “oil of turpentine” in the crude oil. - 
There cannot be a question here of “oil of turpentine” in the real meaning of the 
term, at the most of a similar product. 4 
For many years already, there has been a tendency in British India to become 
independant of foreign countries with regard to turpentine products. For this purpose, i 
early attempts have been made to exploit the native pine woods, consisting especially z 
of Pinus longifolia, Roxb., on which subject we have reported regularly”). The latest ~ 
achievements in this domain, and the present state of the Indian turpéntine industry 
generally, are now described in detail in a publication of the Imperial Institute). ‘The © 
most important turpentine producing districts are West-Almora, Naini Tal and the: East © 
Almora Divisions of the Kumaun region. At Bhowali in Naini Tal, there is a Governm 
plant for the production of oil of turpentine and rosin. Another resin producing pai 
1) Die Seife 2 (1918), N°. 20, page 5, &c. — 2) Die Seife 2 (1917), N°. 22 of November 28th, ae 
Zeitschr. f. Forst- u. Landwirtsch. 16 (1918) 2, 78. — 4) Ibidem, 18. — 5) Ibidem, 28. + 8) Ibidem, 
") Ibidem, 43. — 8) Ibidem, 53. — °) Ibidem, 61. — 1°) Bihang till Jern-Kontorets Annaler. 18 (1! 
page 29; Deutsche Parf.-Ztg.3 (1917), 107. — 44) Comp. Gildemeister and Hoffmann, The Volatile. 
vol. II, p. 82. — 3%) Bull. Imp. Inst. 15 (1917), 544. — 3%) The original’ says “turpentine’’. vir 8 
