The needles of the European larch, Larix decidua, Mill. (Larix europsea, DC.) yield upon distillation but 0,22 p. c. of an oil, sp. gr. 0,878; aD + 0°22'2). It is soluble in 5 and more parts of 90 p. c. alcohol; S. V. 23,3; S. V. after acetylation 46.

Upon fractionation 30 p. c. distilled over between 160 and 165° (aD + 4°15'), 24 p.c. between 165 and 170°, 16 p. c. between 170 and 180°, 8 p.c. between 180 and 190°, 4 p.c. between 190 and 200°, 9 p.c. between 200 and 230°, residue 9 p.c.

The oil of the American larch, Larix pendula, Salisb. {Larix americana, Michx.) has been distilled by R. E. Hanson and E. N. Babcock3). The yield of oil from needles and twigs was 0,149 p.c; d15o0,8816; ester content 15,1 p.c. (computed as bornyl acetate). Fractional distillation yielded the following results: 20 p.c. distilled over between 155 and 170°, 38,4 p.c. between 170 and 180°, 11,2 p.c. between 180 and 190°, 9,2 p.c. between 190 and 200°, 14,8 p.c. between 200 and 240°, residue 6,4 p. c.

After repeated fractionation a fraction 155 to 162° was isolated that contained a-pinene (nitrosochloride, m. p. 108°). The investigators concluded that the oil contains about 15,1 p.c. of esters and that the remainder consists largely of pinene.