“…(4) When curare, nicotine, coniine, sparteine or gelseminine are given mixed with physostigmine, either there is no action at all (curare) or both -actions appear separately though interfering with one another (nicotine, sparteine, gelseminine). (5) These results show, there exists a mutual antagonism between curare, nicotine, coniine, sparteine and gelseminine on one side and physostigmine on the other. (6) In the case of sparteine and probably in that of gelseminine the ineffectiveness of physostigmine was probably due to an inexcitable condition of the muscle caused by them.…”