From numerous experiments made by the commissioners, it was quite clear that those who were most susceptible of the magnetic influence, if magnetised unknown to themselves, were not in the least affected; whereas, when they suspected the operation was performing, they exhibited all the usual phenomena attributed to that power, though in reality nothing was done.

Metallic tractors, as the agents of animal magnetism, under the superintendence of Dr. Perkins, for a time produced a sensation equally extraordinary in England; but it was satisfactorily proved that the imagination of the patient alone gave virtue to the tractors. Dr. Thornton found a wooden skewer had all the power of the tractors in removing pain when clandestinely used instead of them.

The Baron Silfverkielm, of Uleáteog, in Finland, was a great proficient in Mesmerism. He imagined the souls of those magnetically asleep were translated to the regions above, where the souls of the departed were all dressed in white robes, and enjoyed constant scenes of delight. He would interrogate the sleepers, concerning the white robes, Paradise, and the Elysian Fields. He was also desirous to receive intelligence from his ancestors, and, in general, they very kindly sent him their compliments by the mouths of the couriers in white jackets.

By directly attacking the imagination did Mr. Loutherbourg cure vast numbers of patients. He became impressed with the idea that he had a commission from above to cure diseases, and his door was soon crowded with patients all day. Amongst others, a respectable man, from the country, had been afflicted with great pains and swellings, particularly about the loins, so that he could not walk across the room. On entering, Mr. Loutherbourg looked steadfastly at him, and said, “I know your complaint, sir, look at me.” They continued looking at each other some minutes; then Mr. L. asked, if he did not feel some warmth at his loins. The man replied that he did. “Then you will feel in a few minutes much greater warmth.” After a short pause, the man said, “I feel as if a person was pouring boiling water upon me.” Still looking him in the face, Mr. L. said, “How did you come here, sir?” “In a coach.” “Then go and discharge your coach, and walk back to town” (from Hammersmith Terrace, where Mr. L. resided). The coach was discharged, and the patient walked to town, and next day he walked five hours about town without fatigue. He offered ten pounds; but Mr. L. would not take a farthing.

The easy manner in which people have become a prey to illiterate and dangerous pretenders, in the medical art, has been long known. Many thousand volumes would attest the truth of this observation, which has been often repeated. Cotta, in 1612, says, “There is no place or person ignorant how all sorts of vile people and unskilful persons, without restraint, make gainful traffic by botching in physic; and hereby numbers of unwotting innocents daily enthrall and betray themselves to sustain the riot of their enemies and common homicides.” The late Dr. Buchan exclaimed, “As matters stand at present it is easier to cheat a man out of his life than a shilling, and almost impossible to detect or punish the offender.” The case is still the same.

Uroscopy, or water-casting, was once very much practised, and those who professed to cure diseases by such inspection, simply, were consulted by all classes of persons. The absurdity of these pretensions was forcibly exposed by Dr. Radcliffe, on the following occasion. A shoemaker’s wife applied to him to relieve her husband, who was very ill, presenting him with a phial of his water for inspection. The doctor exchanged the contents, and bade her take that back, and tell her husband to make a pair of shoes, by the same instructions.

A Dr. Meyersbach started, about 1770, as a water doctor; he had arrived from Germany in a starving state, and was first an ostler at a riding-school. Not making money fast enough, he set up as a doctor, and was consulted by all classes. Dr. Lettsom took great pains to expose the ignorance and knavery of Meyersbach, whose violent medicines, if they sometimes cured, more often aggravated, his patients’ sufferings. It is believed that he acquired a good fortune, with which he retired to his native country.

Le Fevre, another German, a broken wine-merchant, set up for a gout doctor, and was much noticed by the nobility. Under pretence of going to Germany for more of his powders, he quitted this country, and had the prudence never to return. He carried over above ten thousand guineas, obtained by subscription and otherwise. Living in the style of a prince, he drank daily, as his first toast, “To the credulous and stupid nobility, gentry, and opulent merchants, of Great Britain.”

Calculous disorders are so painful in general, that people suffering from such causes eagerly fly to what promises relief. Many specifics for this disease, lithontriptics as they were called, had their day. In 1771, a Dr. Chittick advertised such a remedy, and made use of a very unusual expedient to keep it secret. He would not intrust it to any one unmixed. The vehicle in which it was to be taken was weak veal broth, which was sent him from day to day. Each of his patients sent him three pints of broth in a tin bottle, padlocked, to prevent curious persons from prying, the doctor and patient each having a key. His terms were two guineas a week, regularly paid, besides which he expected a considerable premium for his pains. Mr. Blackrie, who exposed this species of fraud, detected by analysis a solution of alkaline salts and quicklime; yet the doctor greatly exclaimed against the use of those salts, as highly mischievous.