From the dry leaves of Barosma venusta2), Eckl. et Zeyh., H. R. Jensen3) distilled 1,1 p.c. of a volatile oil with the following properties: d15.5/15.5o0,8839; aD20o + 0°30'; nD20o1,4967; A. V. 2,4; S. V. 13,4; S. V. after acetylation 52,8; phenol content 16 p.c; 4 p.c. of the oil combine with neutral sulphite. Jensen found 35 p.c. of a terpene with the following properties: b. p. about 66,5° (15 to 18 mm.); d15o 0,790; nD20o1,4778. It did not boil without decomposition at ordinary temperature and whenhydrated yielded an alcohol, the acetic ester of which had the odor of linalyl acetate. In contact with the air it resinified very rapidly. All of the properties accord with those of myrcene. Jensen assumes that the following constituents are likewise contained in the oil: methyl chavicol (conversion into anethol), the acetate of myrcenol or an isomer thereof, chavicol (n 1,538; green color with ferric chloride) and possibly an olefinic sesquiterpene. Diosphenol was not present.