The assay of veratrum viride*12*Presented before the Scientific Section, A. Ph. A., Minneapolis meeting, 1938.1Abstract of a thesis presented to the Graduate Council of the University of Florida in partial fulfilment of the requirements for the degree of Doctor of Philosophy.2Part of this work was carried on in the Department of Pharmacology, School of Medicine, University of Oklahoma, and was aided by a grant from the Research Fund of the University of Oklahoma School of Medicine.