It must be admitted that many of our accepted provings cannot as well bear a similar test.
III.
There is another feature that the believer in the law of similars should find no insuperable difficulty in accepting as a criterion of the validity of a proving, namely: the similarity of the drug symptoms to certain disease symptoms. I am not ready to believe that drug symptoms are only the result of a "fortuitous concourse of atoms," nor can I for one moment imagine that they are the product of blind and aimless chance. I plainly discern in them the result of law, and I am wholly unable to conceive of existing law without the absolutely necessary pre-existing law maker. The consequent must have its antecedent. Therefore, in a drug symptom I see a purpose, and by the light of the law of similars I find the purpose of a drug symptom in an analogous disease symptom—they answer to each other as face unto face in the refiner's silver—and behind and beyond them both is another purpose, of wisdom inscrutable, of love unfathomable. In a word, my reader, the problem of the visible universe forces upon me the alternative that weighed upon Marcus Aurelius—"either gods, or atoms." With atoms only I cannot account for law; with God and in God both atoms and law find a meaning and a purpose.
If I were submitting these convictions, or, if you will, this "working hypothesis," to a Sir Thomas Browne, or a William Harvey, or a Thomas Sydenham I should feel no momentary hesitation; as it is, I can only hope that the spirit that filled these worthies is not extinct in days when the "spiritual colic" that disordered an imaginary Robert Elsmere is thought to disturb the eternal Verities. I much doubt if they who mistake an eclipse for an annihilation will get any good from this poor pen of mine.
The resemblance between the symptoms of angina pectoris and the effects of the poison of Latrodectus mactans are so striking as to justify the presentation of a comparison; and it is hoped that physicians of wide reading will pardon what may seem to them a piece of supererogation for the sake of many a humbler practitioner whose opportunities have not been so happy. At the same time, the widest reader must admit that he has not found any one authority who has given a complete picture of angina pectoris. Nor is it essential that such an all-including "composite" shall now be presented; on the contrary, we shall offer only salient points substantiated by observers of the highest order.
It will be well to start from an authority whose scholarship has never been excelled—Copland. Of all our medical writers he may be called the Great Definer—his readers will know what that means.
"Acute constricting pain at the lower part of the sternum, inclining to the left side, and extending to the arm, accompanied with great anxiety, difficulty of breathing, tendency to syncope, and feeling of approaching dissolution."
Copland presents a group of constants, and, for a terse definition, has well covered the principal phenomena. As variants he has omitted the pulse and the surface temperature. He errs on the side of dogmatism in defining the character of the pain as "constricting;" "aching, burning, or indescribable," and "generally attended with a sense of constriction" is more in accordance with the actual condition. Of Copland's seven constants, Case 4 presents an analogue for each in symptoms IX., V., III., VIII., XII., and the "tendency to syncope," which is not included in our table because Dr. Semple did not put the fact in express words. If to this group we add the thready pulse and cold skin, we shall have "covered" nine of the most prominent symptoms of angina pectoris; a pathological "composite" with a most striking pathogenetic similimum.
But all the elements of Copland's group are not of equal importance; two of them, at least, are pathognomonic. "The two constituent elements of the paroxysm," says Latham, are "the sense of dissolution and the pain." "Pain with one awful accompaniment may be everything." "This mixture of the sharpest pain with a feeling of instant death." According to Fothergill "the two prominent subjective phenomena are pain in the chest and a sense of impending death." Eulenburg and Guttmann include another element: "We regard the substernal pain, the feeling of anxiety, and the disturbance of the heart's action, as the essential symptoms of angina pectoris." Romberg notes the companionship of these two elements: "The patient attacked with angina pectoris is suddenly seized with a pain under the sternum in the neighborhood of the heart, accompanied by a sense of anxiety so intense as to induce a belief in the approach of death."
We have laid the emphasis of these various citations on the "essential symptoms" in order to assert, with equal emphasis, that their analogues occur in not only one case of Latrodectus mactans poisoning. The præcordial pain is noted in Cases 1, 3, 4 and 5, and the sense of impending dissolution in Cases 1, 4 and 5. And that disturbance of the heart's action which Eulenburg and Guttmann consider an essential element is found in Cases 1, 2, 4 and 5; so that the tout ensemble presented by Case 4 is corroborated.