Sympathies have rarely been proved; they afford a kind of pleasure which those who are so happy as to possess them rarely speak of unless they are abnormally singular, and even then only in the privacy of intimate intercourse, where everything is buried. But the antipathies that arise from the inversion of affinities have, very happily, been recorded when developed by famous men. Thus, Bayle had hysterics when he heard water splashing, Scaliger turned pale at the sight of water-cress, Erasmus was thrown into a fever by the smell of fish. These three antipathies were connected with water. The Duc d'Epernon fainted at the sight of a hare, Tycho-Brahe at that of a fox, Henri III. at the presence of a cat, the Marechal d'Albret at the sight of a wild hog; these antipathies were produced by animal emanations, and often took effect at a great distance. The Chevalier de Guise, Marie de Medici, and many other persons have felt faint at seeing a rose even in a painting. Lord Bacon, whether he were forewarned or no of an eclipse of the moon, always fell into a syncope while it lasted; and his vitality, suspended while the phenomenon lasted was restored as soon as it was over without his feeling any further inconvenience. These effects of antipathy, all well authenticated, and chosen from among many which history has happened to preserve, are enough to give a clue to the sympathies which remain unknown. This fragment of Lambert's investigations, which I remember from among his essays, will throw a light on the method on which he worked. I need not emphasize the obvious connection between this theory and the collateral sciences projected by Gall and Lavater; they were its natural corollary; and every more or less scientific brain will discern the ramifications by which it is inevitably connected with the phrenological observations of one and the speculations on physiognomy of the other. Mesmer's discovery, so important, though as yet so little appreciated, was also embodied in a single section of this treatise, though Louis did not know the Swiss doctor's writings--which are few and brief.