I wish to publicly express my thanks to all who have taken part in these provings. I think it but just to state that the University of Michigan furnished the best provings. Thanks also are extended to Boericke & Tafel for remedy furnished in the [Greek: theta], 3x, 30x, which were also used in the provings. One lady, who commenced the proving and had begun to develop valuable provings, contracted a severe cold and stopped, for which I am very sorry. All the rest of the provers were males; medical students or physicians. Only a very few symptoms were produced by the use of the 30x attenuation, a greater number of provers not recording any at all. The symptoms here compiled were produced by the 3x attenuation and the tincture, using from one drop to thirty drops at a dose. In proving and then compiling the symptoms produced by this drug, I am fully aware of the many difficulties to be met on every side. The one great trouble that I find is that those who are unaccustomed to proving do not observe what really is going on while attempting to make a proving, and are not capable of expressing the conditions so produced. I find that there are few who can take drugs and accurately define their effects. In selecting and discriminating the effects of drugs there must exist a mental superiority, and no man had this genius so highly developed as Hahnemann. After making three different provings upon myself, I have undertaken to select those symptoms which to the best of my ability were found in all of these different provings. I have taken special care not to omit any symptoms, even though it may have been noticed by but one prover; but in the majority of cases you will notice the symptoms occurred two or more times in different individuals, thus confirming the genuineness of the symptoms. Not giving you the day-book records of these provers, a few remarks, showing its general action, may not be out of place. As stated before, only two recorded symptoms after the use of the 30x attenuation. After taking the tincture, there is soon produced a biting, tingling sensation of the tongue, lips and fauces, not very much unlike the sensation produced by _Aconite_. In these provers there soon followed a sense of fear, with pain about the heart, and accelerated pulse. In a short time there was noticed a dull pain in both temples, a pressing pain; then shooting pains, which followed the fifth pair of nerves. The next symptom produced was an accumulation of sticky mucus in mouth and fauces. Then a general languor and weakness followed, always worse in the afternoon. All the limbs felt weak and indisposed to make any motion, and this was accompanied by sharp, shooting, shifting pains. In quite a number of cases the appetite was not affected.