“…The natural products used in this work were obtained from a commercial source. 1 Gravimetric Method for Water DeterminatiowThe water content of all the products, except caraway, cinnamon, clove, ginger, and peppermint, was determined by the N F XI1 procedure (25) for vegetable drugs containing no constituents volatile at 105". The water content of caraway, cinnamon, clove, ginger, and peppermint was determined by the N F XI1 procedure (25) for vegetable drugs containing ether-soluble constituents volatile at 105".…”