How characteristically recent this old story is; it is renewed on every possible occasion and wears all the familiar aspect of modern devices for securing recognition and obtaining the apparent approbation or recommendation of some scientific society or institution. We had an example of it a few years ago when a nostrum exploiter signed the register of an International Congress immediately after a great medical investigator and then used a photograph of the names for advertising purposes. How did the tractors secure the vogue they enjoyed? Those who believed in them did so not because of the scientific theory that animal magnetism or magnetic influence was behind them, nor because of the plausible ways of the Connecticut Yankee, but because of the unquestioned and unquestionable facts of actual healing that they saw in connection with the use of the tractors. Every one of these applications of science to medicine that has proved to be pseudo-scientific after enthusiasm subsides has made its appeal through the cures effected by it. Cures are what Eddyism advances to support its claims, cured patients are presented as their most effective argument by the osteopaths, cured symptoms are the proofs for Hahnemannism, but none of these systems of treatment ever cured as many cases in a corresponding time as did Perkins' tractors. They cured all sorts of physical ills, but their only effect was exerted through the mind. Holmes wrote: Let us now look at the general tenor of the arguments addressed by believers to sceptics and opponents. Foremost of all, blazoned at the head of every column, loudest shouted by every triumphant disputant, held up as paramount to all other considerations, stretched like an impenetrable shield to protect the weakest advocate of the great cause against the weapons of the adversary, was that omnipotent monosyllable which has been the patrimony of cheats and the currency of dupes from time Immemorial--Facts! Facts! FACTS! First came the published cases of the American clergymen, brigadier-generals, almshouse governors, representatives, attorneys and esquires. Then came the published cases of the surgeons of Copenhagen. Then followed reports of about one hundred and fifty cases, published in England, "demonstrating the efficacy of the metallic practice" in a variety of complaints, both upon the human body and on horses, etc. But the progress of facts in Great Britain did not stop here. Let those who rely upon the numbers {51} of their testimonials, as being alone sufficient to prove the soundness and stability of a medical novelty digest the following from the report of the Perkinistic Committee. "The cases published (in Great Britain) amounted, in March last, the date of Mr. Perkins' last publication, to about five thousand. Supposing that not more than one cure in three hundred, which the tractors have performed, has been published, and the proportion is probably much greater,