The author gave the chief results of 120 experiments upon frogs, rabbits, and dogs, as follows:—

1. He showed, by novel methods of experimentation, that the inferior cardiac branches of the vagi are—as the brothers Weber. pointed out—inhibitory nerves of the heart, and that they cannot in any sense be regarded as motor nerves of the heart, as maintained by Schiff, Moleschott, Lister, and others. The experiments bearing on this question were performed in 1866–67.