22 OLEOEESINS OF SOME WESTERN PINES. 



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(7) SCHIMMEL & Co. "Oil of Pinus sablniana" Report for October, 1906, pp. 



64-65. 



(8) SCHORLEMMER, C., and THORPE, T. E. "Ueber die normalen Paraffine." 



Annalen, pp. 149-152, vol. 217, 1883. 



(9) SEMMLER, F. W. "N-Heptan (Abieten)." "Die Aetherischen Oele." pp. 



323-328, vol. 1, 1906. 



(10) THORPE, T. E. "On heptane from Pinus sabiniana." Jour. Chem. Soc., pp. 



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(11) TRIMBLE, H. "The source of abietene." Garden and Forest, p. 202, vol. 10, 



1897. 



(12) VENABLE, F. P. "Ueber einige Derivate des Heptans von Pinus sabiniana.' 1 



Berichte, pp. 1649-1652, vol. 13, 1880. 



(13) VENABLE, F. P. and GRISSOM, R. G. "Action of chlorous acid upon hepty- 



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(14) WENZELL, W. T. "Abietene a new hydrocarbon." Am. Jour. Pharm., pp. 



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Pinus Lambertiana Dougl. 

 EXAMINATION OF THE OLEORESIN. 



The crude oleoresin from sugar pine (Pinus lambertiana) had a spe- 

 cific gravity of 1.0420. The average composition of two analyses 

 follows : 



Per cent. 



Volatile oil 16. 4 



Rosin (grade H or seventh grade) 75. 3 



Chips, needles, etc 3. 4 



Water (by difference) 49 



Total 100. 



The oleoresin was stringy, contaminated with needles and fine dust, 

 and foamed badly on distillation with steam; the last portion of vol- 

 atile oil was removed with great difficulty. 



A portion of one sample was heated until it became fluid (about 

 90 C.) and then filtered. An analysis gave the following results: 



Per cent. 



Volatile oil 16. 2 



Rosin (grade K or fifth grade) 82. 



Dirt 0.1 



Water (by difference) 1. 7 



Total 100. 



The filtered material gave a rosin two grades higher than that 

 obtained from the original oleoresin, which well illustrates the effect 

 of trash in darkening the color. From the examination of various 



