The _circulation_ is sometimes disturbed. The head becomes giddy, the chest oppressed, the pulse hard and frequent—with a sense of prostration, or, on the contrary, of excitement. These are considered by the authorities above-mentioned, as precursors of the critical discharges, and return of health. In many cases such stormy crises do not take place, and the cure is effected gradually and imperceptibly. In people of plethoric habits and irritable temperaments, when any of the foregoing symptoms occur, it is safest to mix the water with some warm milk, or allow the carbonic acid gas to escape before it is taken. The Kreuzbrunnen, however, is one of those solvent, and, at the same time, tonic waters (according to Dr. Heidler) that may be taken by almost every one, whatever the age, sex, or constitution, with little or no danger, even where there are complications of organic diseases of the heart, lungs, or great vessels. In such cases, the dilution with warm milk and the extrication of the gas, will be proper. Dr. Heidler cites the case of a young lady who came to Marienbad labouring under sympathetic hectic fever, and who had had hæmoptysis. The stomach would retain no food—especially the dinner. Constipation was obstinate, and nocturnal perspirations were profuse. The Kreuzbrunn waters were taken, and, after eight days, the fever ceased. In four weeks more the stomach became retentive. Next Summer, however, she returned to Marienbad, with the evening vomitings as before. Eight days’ course of the waters dispelled the sickness, and she recovered her health. The physicians of Marienbad exhibit the Kreuzbrunn to people who have had apoplectic attacks, provided all symptoms of congestion be removed before the waters are begun. In hæmorrhoidal and other sanguineous fluxes, the same source may be used; but in moderate quantities. The effects of the Kreuzbrunn on the nervous system are much dwelt on by Dr. Heidler and the other practitioners. They are considered to be antispasmodic, and are highly praised in the numerous and Proteian forms of hysteria, hypochondriasis, weakness of stomach, &c. Many patients of this kind recover at the Kreuzbrunn, after vainly trying more tonic and chalybeate springs elsewhere.