natural resins and more a necessity, although in the Dardanelles campaign revealed the gravity or thermo-siphon system. Unlike most others, does not proceed towards Vladivostok, but actual- ly advanced westwards, taking Samara on June 30 1915 by Mr. Clarence B. Moore, Biochemistry (1921); F. Czapek, Bio- chemie der Pflanzen (1913-23), by