[28] Had Fernberger investigated such of his predecessors as Lumholtz, the novelty of his results would have impressed him less. And had his experiments been more critical he would not be superfluously supplied with an “explanation” to a problem where no data to be explained exist (compare the a-priorism of the “parapsychologists”). But Fernberger continues: “For every one of the observers the anti-aphrodisiac effect of the drug was marked and continued, in most cases, for at least 24 hours after the period of intoxication. Efforts at erotic stimulation proved ineffective. In several cases physical automanipulation of the genitals failed to produce the usual physiological effect. The calling up of erotic images—visual and verbal—were equally ineffective.” [29] An able and sincere field worker has told the writer of an experience at a meeting which ended for him in orgasm. But he would agree that detailing of similar White “aphrodisiac” experiences is edifying more as regards individuals than the drug. This paper aims to deal with the _native_ peyote cult. [30] Klüver, _Mescal, the Divine Plant_, 101; but peyote is a complex of physiologically antagonistic drugs of quite variable reaction. [31] Jolly, _Über die schlafmachende; Über Pellotine_, 375-76. This effect is all the more remarkable since Heffter in similar experiments noted that pellotine produced in the frog excitability and reflex tetanus. [32] Heffter, _Über Pellotin_, 327-28. [33] Loaeza, in del Campo, _Peyote_, 145. Koang-Hobschette (_Les Cactacées_, 41) says cactine, the active element of _Cereus grandiflorus_ Mill. is used like digitalis as a cardio-tonic, strengthening the systole and diminishing the diastole like strychnine. [34] Henry (T. A.), _The Plant Alkaloids_, 199. [35] Rouhier, _Monographie_, 340. [36] Parke Davis and Co. formerly manufactured the drug. See their _Newer Pharmacology_.