As soon as Dr. Hering had published the provings of the bee poison, in his "American Provings," I at once submitted them to the test of experience in an extensive practice. I prepared the drug which I used for this purpose, by pouring half an ounce of alcohol on five living bees, and shaking them during the space of eight days, three times a-day, with one hundred vigorous strokes of the arm. From this preparation, which I used as the mother-tincture, I obtained attenuations up to the thirties centesimal scale. So far, the effects which I have obtained with this preparation, have been uniformly satisfactory. It has seemed to me that the lower potencies lose in power as they are kept for a longer period; hence, I consider it safer to prepare them fresh every year. As a general rule, I have found either the third or the thirtieth potency, sufficient. Day after day I have obtained more satisfactory results, and now I look upon Apis mellifica as the greatest polychrest, next to Aconite, which we possess. The introduction of this poison to the medical profession, will be looked upon as the most brilliant merit of one of the most deserving apostles of homœopathy, and will secure immortality to the honored name of Constantine Hering. The following statements will show how far this faith of a grateful heart is founded upon facts: _Apis mellifica is the most satisfactory remedy for acute hydrocephalus of children._ The more acute and dangerous the attack, the more readily will it yield to the action of Apis. Sudden convulsions, followed by general fever, loss of consciousness, delirium, sopor while the child is lying in bed, interrupted more or less by sudden cries; boring of the head into the pillow, with copious sweat about the head, having the odor of musk; inability to hold the head erect; squinting of one or both eyes; dilatation of the pupils; gritting of the teeth; protrusion of the tongue; desire to vomit; nausea, retching and vomiting; collapse of the abdominal walls; scanty urine, which is sometimes milky; costiveness; trembling of the limbs; occasional twitching of the limbs on one side of the body, and apparent paralysis of those of the other side; painful turning inwards of the big toes, extorting cries from the patient; accelerated pulse, which soon becomes slower, irregular, intermittent and rather hard; these symptoms inform us that life is in danger, the more so the more numerous they are grouped together.