1. The wooden chips of Taiwania Cryptomerioides, Hayata, gives on steam distillation 0.23% of an oil, consisting chiefly of sesquiterpene and sesquiterpene alcohol. 2. The sesquiterpenes in the oil are chiefly cadinene, with a little humulene and caryophyllene. 3. From the cadinene, a new oxidation product C12H22O2 (m.p.=142°–143°) was obtained. 4. The sesquiterpene alcohol in the oil, to which the authors suggest the name “taiwanol,” closely resembles cadinol of Semmler and Jonas. From cadinol no crystalline phenyl urethane could be obtained, but in case of taiwanol, it affords a crystalline pheyl urethane melting at 134°–135°, and furthermore, it gives a neutral oxidation product (m.p. 170°) if oxidized with permanganate in acetone solution.