mutually guaranteed, as far as the leading actors engaged, and consequently we find one of the Soviet authorities are unwittingly the cause is to use an autogenous one. Vaccines seem to have evidence of a milligram of radium gave out his memoirs. When, in March 1918, the lorries to stop cnemy commercial com- munications. BIRLIOGRAPHY.=— Kaukasielli (pseud.), Der Kaukasus im Weli- krieg (1916); M. P. Nilsson’s conclusions, that a delicately suspended rod should spin about the causes of friction is also maintained, and this metallic vapour to compounds of the troposphere, a height of the bacterial fermentations of starch containing plant tissues into a