"PERKINS' TRACTORS" EXPOSED.
Faith in the medicinal potency of the properties of the loadstone was, for centuries after its discovery, a regular part of many physicians' mental stock-in-trade; and pulverized magnet was administered in the form of pills, and potions, and salves, even after Dr. Gilbert, of Colchester, had in 1660 scientifically ascertained and published the fact, that when reduced to powder the loadstone ceases totally to possess its magnetic properties. The belief in the efficacy of magnets held its ground much later. Even in 1779 and 1780, the Royal Society of Medicine at Paris made experiments with the view of precisely ascertaining the influence of magnets on the human system; and the conclusion reached was, that they exerted a healing potency of no contemptible character. It was about this time that the instruments called "Perkins' Tractors," which were supposed to be endowed with magnetic power, came into vogue. Perkins was an American citizen, from the shrewd State of Connecticut; and only he could make, and only he sell, the painted nails, composed of an alloy of various metals, that were in great demand among the credulous and the wealthy. For a considerable time the wonderful tractors attracted and perplexed everybody; until Dr. Haygarth of Bath, in the following manner, made it apparent that the efficacy of the tractors lay not in themselves, but in the mental condition of the person upon whom they were used:—"Robert Thomas, aged forty-three, who had been for some time under the care of Dr. Lovell, in the Bristol Infirmary, with a rheumatic affection of the shoulder, which rendered his arm perfectly useless, was pointed out as a proper object of trial by Mr. J. W. Dyer, apothecary to the house. Tuesday, April 19th, having everything in readiness, I passed through the ward, and, in a way that he might suspect nothing, questioned him respecting his complaint. I then told him that I had an instrument in my pocket which had been very serviceable to many in his state; and when I had explained to him how simple it was, he consented to undergo the operation. In six minutes no other effect was produced than a warmth upon the skin, and I feared that this coup d'essai had failed. The next day, however, he told me that 'he had received so much benefit that it had enabled him to lift his hand from his knee, which he had in vain several times attempted on Monday evening, as the whole ward witnessed.' The tractors I used being made of lead, I thought it advisable to lay them aside, lest, being metallic points, the proof against the fraud might be less complete. Thus much, however, was proved, that the patent tractors possessed no specific power independent of simple metals. Two pieces of wood, properly shaped and painted, were next made use of; and in order to add solemnity to the farce, Mr. Barton held in his hand a stop-watch, whilst Mr. Lax minuted the effects produced. In four minutes the man raised his hand several inches, and he had lost also the pain in his shoulder, usually experienced when attempting to lift anything. He continued to undergo the operation daily, and with progressive good effect; for, on the twenty-fifth, he could touch the mantelpiece. On the twenty-seventh, in the presence of Dr. Lovell and Mr. J. P. Noble, two common iron nails, disguised with sealing-wax, were substituted for the pieces of mahogany before used. In three minutes he felt something moving from his arm to his hand, and soon after he touched the board of rules which hung a foot above the fire-place. This patient at length so far recovered that he could carry coals and use his arm sufficiently to help the nurse; yet, previous to the use of the spurious tractors, he could no more lift his hand from his knee than if a hundredweight were upon it, or a nail driven through it, as he declared in the presence of several gentlemen. The fame of this case brought applications in abundance; indeed, it must be confessed, that it was more than sufficient to act upon weak minds, and induce a belief that these pieces of wood and iron were endowed with some peculiar virtues."
The prosecution and publication of the result of Haygarth's experiments, led to the downfall of Perkins and the discredit of the tractors; but it was not very long before Mesmerism had established a yet stronger hold on the public credulity, which seems never to be content, if it is not fooled to the top of its bent.