Piper Volkensii, C. DC. occurs abundantly in the moist woods of Usambara. According to R.Schmidt and K. Weilinger1) the leaves yield 0,3 p.c. of a volatile oil light-brown in color, of a strong but pleasant odor and possessing the following properties: b.p. 90 to 175° (12 mm.); d20o0,934; aD - 8°24'; nD1,5017; ester content (geranyl acetate) 6 p.c; content of free alcohols C10H18O 14 p.c. By means of phthalic acid anhydride 4 p.c. of a primary alcohol (possibly citronellol) was removed from the oil. The principal fraction (70 p.c.) of the saponified oil boiled between 135 and 148° (15 mm.) and added bromine with the formation of a bromide C11H12O3Br2 that melted at 122°. Reduced with zinc dust and glacial acetic acid the substance C11H12O3 was regenerated. Inasmuch as this product contained 14,1 p.c. methoxyl, the investigator supposed that it might be a methoxy-safrol. Besides the principal fraction was found to contain limene, a sesquiterpene which has been isolated by Burgess and Page from limette oil, and which is identical, with bisabolene (see Vol. I, p. 328). Like this, the sesquiterpene in question added 3 molecules of hydrogen chloride (m. p. of the chlorhydrate 79 to 80°) and 6 atoms of bromine (m. p. of bromide 154°).