The neighbouring mineral source—SPA—together with SCHWALBACH, BROCKENAU, BOCKLET, and other chalybeate springs, attract a different class of votaries—namely, the pallid, the debilitated, the leucophlegmatic—those, in fact, who have been sucked, and left bloodless by vampyre diseases. The emblem of WISBADEN might be a swelled and gouty foot—that of WILDBAD a crutch, or a hobbling paralytic invalid—KISSENGEN, the tumid liver and green fat—MARIENBAD, the paunch of Falstaff, and the jaundiced eye. But CARLSBAD presents a greater medley than any of the other spas that I have visited. When we contemplate, even for a single morning, the crowds that surround the Sprudel alone, presenting specimens of almost every human infirmity, not in solitary cases, but often in trains of twenties or thirties in succession—when we consider that, in these various specimens, there are many that are of a diametrically opposite nature to each other—yet all cured or relieved by an upheaving fountain that never varies in temperature, taste, or composition—doubts may well arise whether there is not some truth in the sarcastic remark of an eminent philosopher,—that “there are more false _facts_ than false _theories_ in physic.”—But there is something to be said PER CONTRA. 1st. Many complaints which are thought and believed to be cured by mineral waters, are only _relieved pro tempore_—and the contradiction seldom or never appears. 2d. Many different diseases are produced by the _same causes_ acting on different constitutions. Thus luxurious living and idleness will, in one person, induce gout—in a second, hæmorrhoids—in a third, liver complaint—in a fourth, rupture of a bloodvessel in the lungs—in a fifth, congestion in the brain—in a sixth, paralysis—in a seventh, stone in the kidney or bladder,—and the list might be far extended. Now, if the same cause or class of causes produce such a number of different maladies; there is nothing unreasonable in the supposition that the same remedy, or class of remedies, may be useful in abating or even removing those varied disorders. 3d. With the exception of a few specific remedies, such as mercury, sulphur, colchicum, and ergot, with the real nature of whose physiological operation on the human frame little is known, almost all the other medicinal agents act through the medium of the digestive organs, the liver, the kidneys, and the skin. Now, the mineral waters of such spas as Wisbaden, Kissengen, Marienbad, Carlsbad, &c. act through these organs also, and contain the elements of many of our most efficient remedies. They have, besides, great advantages over ordinary medicines at home, in consequence of the exercise of travelling, the change of air, and the alteration of habits that precede the course of the waters.