Upon distillation with steam of the needles (without branches) of the Siberian cedar (Pinus Cembra, L, Ger. Arve, Zirbelkiefer) F. Flawitzky2) obtained 0,88 p. c. of volatile oil. It deviated polarized light to the right, aD + 29,10 and consisted principally of d-a-pinene (m. p. of chlorhydrate 125°). Fraction 156° had the high specific angle of rotation [a]D +45,04°.