This subject dismissed, I may now take up that which it led to, and further tax your patience with unlearned views of medicine; which, as in most cases, are, perhaps, the more confident in proportion as they are less enlightened.
We know, from what we see and feel, that the animal body is in its organs and functions subject to derangement, inducing pain, and tending to its destruction. In this disordered state, we observe nature providing for the re-establishment of order, by exciting some salutary evacuation of the morbific matter, or by some other operation which escapes our imperfect senses and researches. She brings on a crisis, by stools, vomiting, sweat, urine, expectoration, bleeding, &c, which, for the most part, ends in the restoration of healthy action. Experience has taught us also, that there are certain substances, by which, applied to the living body, internally or externally, we can at will produce these same evacuations, and thus do, in a short time, what nature would do but slowly, and do effectually, what perhaps she would not have strength to accomplish. Where, then, we have seen a disease, characterized by specific signs or phenomena, and relieved by a certain natural evacuation or process, whenever that disease recurs under the same appearances, we may reasonably count on producing a solution of it, by the use of such substances as we have found produce the same evacuation or movement. Thus, fulness of the stomach we can relieve by emetics; diseases of the bowels, by purgatives; inflammatory cases, by bleeding; intermittents, by the Peruvian bark; syphilis, by mercury; watchfulness, by opium; &c. So far, I bow to the utility of medicine. It goes to the well defined forms of disease, and happily, to those the most frequent. But the disorders of the animal body, and the symptoms indicating them, are as various as the elements of which the body is composed. The combinations, too, of these symptoms are so infinitely diversified, that many associations of them appear too rarely to establish a definite disease: and to an unknown disease, there cannot be a known remedy. Here, then, the judicious, the moral, the humane physician should stop. Having been so often a witness to the salutary efforts which nature makes to re-establish the disordered functions, he should rather trust to their action, than hazard the interruption of that, and a greater derangement of the system, by conjectural experiments on a machine so complicated and so unknown as the human body, and a subject so sacred as human life. Or, if the appearance of doing something be necessary to keep alive the hope and spirits of the patient, it should be of the most innocent character. One of the most successful physicians I have ever known, has assured me, that he used more bread pills, drops of colored water, and powders of hickory ashes, than of all other medicines put together. It was certainly a pious fraud. But the adventurous physician goes on, and substitutes presumption for knowledge. From the scanty field of what is known, he launches into the boundless region of what is unknown. He establishes for his guide some fanciful theory of corpuscular attraction, of chemical agency, of mechanical powers, of stimuli, of irritability accumulated or exhausted, of depletion by the lancet, and repletion by mercury, or some other ingenious dream, which lets him into all nature’s secrets at short hand. On the principle which he thus assumes, he forms his table of nosology, arrays his diseases into families, and extends his curative treatment, by analogy, to all the cases he has thus arbitrarily marshaled together. I have lived myself to see the disciples of Hoffman, Boerhaave, Stahl, Cullen, Brown, succeed one another like the shifting figures of a magic-lanthern, and their fancies like the dresses of the annual doll-babies from Paris, becoming, from their novelty, the vogue of the day, and yielding to the next novelty their ephemeral favor. The patient, treated on the fashionable theory, sometimes gets well in spite of the medicine. The medicine therefore restored him, and the young doctor receives new courage to proceed in his bold experiments on the lives of his fellow creatures. I believe we may safely affirm, that the inexperienced and presumptuous band of medical tyros let loose upon the world, destroys more of human life in one year, than all the Robin-hoods, Cartouches, and Macheaths do in a century. It is in this part of medicine that I wish to see a reform, an abandonment of hypothesis for sober facts, the first degree of value set on clinical observation, and the lowest on visionary theories. I would wish the young practitioner, especially, to have deeply impressed on his mind the real limits of his art, and that when the state of his patient gets beyond these, his office is to be a watchful, but quiet spectator of the operations of nature, giving them fair play by a well regulated regimen, and by all the aid they can derive from the excitement of good spirits and hope in the patient. I have no doubt, that some diseases not yet understood may in time be transferred to the table of those known. But, were I a physician, I would rather leave the transfer to the slow hand of accident, than hasten it by guilty experiments on those who put their lives into my hands. The only sure foundations of medicine are, an intimate knowledge of the human body, and observation on the effects of medicinal substances on that. The anatomical and clinical schools, therefore, are those in which the young physician should be formed. If he enters with innocence that of the theory of medicine, it is scarcely possible he should come out untainted with error. His mind must be strong indeed, if, rising above juvenile credulity, it can maintain a wise infidelity against the authority of his instructers, and the bewitching delusions of their theories. You see that I estimate justly that portion of instruction, which our medical students derive from your labors; and, associating with it one of the chairs which my old and able friend, Doctor Rush, so honorably fills, I consider them as the two fundamental pillars of the edifice. Indeed, I have such an opinion of the talents of the professors in the other branches which constitute the school of medicine with you, as to hope and believe, that it is from this side of the Atlantic, that Europe, which has taught us so many other things, will at length be led into sound principles in this branch of science, the most important of all others, being that to which we commit the care of health and life.
I dare say, that by this time you are sufficiently sensible that old heads, as well as young, may sometimes be charged with ignorance and presumption. The natural course of the human mind is certainly from credulity to scepticism: and this is perhaps the most favorable apology I can make for venturing so far out of my depth, and to one, too, to whom the strong as well as the weak points of this science are so familiar. But having stumbled on the subject in my way, I wished to give a confession of my faith to a friend; and the rather, as I had perhaps, at times, to him as well as others, expressed my scepticism in medicine, without defining its extent or foundation. At any rate, it has permitted me, for a moment, to abstract myself from the dry and dreary waste of politics, into which I have been impressed by the times on which I happened, and to indulge in the rich fields of nature, where alone I should have served as a volunteer, if left to my natural inclinations and partialities.
I salute you at all times with affection and respect.
Th: Jefferson.
LETTER LVI.—TO MR. BOWDOIN, July 10, 1807
TO MR. BOWDOIN.
Washington, July 10, 1807.
Dear Sir,
I wrote you on the 10th of July, 1806; but supposing, from your not acknowledging the receipt of the letter, that it had miscarried, I sent a duplicate with my subsequent one of April the 2nd. These having gone by the Wasp, you will doubtless have received them. Since that, yours of May the 1st has come to hand. You will see by the despatches from the department of State, carried by the armed vessel the Revenge, into what a critical state our peace with Great Britain is suddenly brought, by their armed vessels in our waters. Four vessels of war (three of them two-deckers) closely blockade Norfolk at this instant. Of the authority under which this aggression is committed, their minister here is unapprized. You will see by the proclamation of July the 2nd, that (while we are not omitting such measures of force as are immediately necessary) we propose to give Great Britain an opportunity of disavowal and reparation, and to leave the question of war, non-intercourse, or other measures, uncommitted, to the legislature. This country has never been in such a state of excitement since the battle of Lexington. In this state of things, cordial friendship with France, and peace at least with Spain, become more interesting. You know the circumstances respecting this last power, which have rendered it ineligible that you should have proceeded heretofore to your destination. But this obstacle is now removed by their recall of Yrujo, and appointment of another minister, and, in the mean time, of a chargé des affaires, who has been received. The way being now open for taking your station at Madrid, it is certainly our wish you should do so, and that this may