the virulence of poisons and the varying degrees of the sensibility to
toxic effects, it is not strange that the snake-stones should sometimes
seem to give good results. Tavernier states that these stones were
brought to India by Portuguese sol-
0Tavernier, "Voyages en Turquie, en Perse, et aux Indes," Paris, 1718, vol. ii, p. 392; liv. ii, chap. 24.