Dr. Bamberg, of Berlin, published a paper on the modern practice of Carlsbad, in the year 1835, from which I shall collect a few facts or opinions. Dr. B. was astonished to find at least ten drinkers at the NEUBRUNN or MUHLBRUNN for one at the “Old Man of the Valley,” the splendid SPRUDEL. The Theresebrunn too, was not less frequented than her sister Naiads. It appears that a spa-doctor, now dead, had denounced the Sprudel as a most dangerous water on account of its high temperature, and prejudicing the visitors against it, by alleging, when other arguments failed, that it mounted up to the head with the same force and velocity with which it springs from its hidden source! The prejudice was erroneous. All the waters are from the same source, and the temperature of the Sprudel is generally as low as that of the others before it reaches the stomach. The Carlsbad doctors, however, are often greatly teazed by the directions brought by visitors from their own physicians, respecting the particular springs which they are to use. Some prejudice still hangs over the Sprudel, and that it is generally looked upon as of superior power to the others, is proved by the character of the drinkers there. The sick are more seriously ill—their aspects more sinister—and their figures more demonstrative of organic diseases at the Sprudel than elsewhere. But fashion comes in to the aid of prejudice. The Archipelago formed by the Neubrunn, Muhlbrunn, and Theresebrunn, is decorated so elegantly, and the temperature so drinkable, as the water rises from its source, that we need not wonder at the multitudes that crowd around them, especially when the physicians assure their patients that the waters of these fountains are precisely the same as the Sprudel. The Sprudel possesses two very curious and clashing properties—that of creating stony concretions where they did not previously exist, and of dissolving them when already formed—like the famous sword of antiquity, whose rust healed the wound inflicted by its edge. The Carlsbad waters have the power of dissolving calculi in the human bladder, and are much resorted to for that purpose. Dr. Bigel, of Warsaw, has published his own case, in a letter to Dr. De Carro, some particulars of which may here be stated.