This almost miraculous cure attracted Dr. Heidler’s attention to the subject, and, from that period, he has made numerous experiments on other patients, with this new remedy, as well as on himself personally, and published the results in the year 1819, at Vienna. The succeeding year six gas-bathing chambers were constructed, and now, (August 1840) this gas-bathing establishment is on the completest scale of perfection. The Count St. Leu, and Marshal Schwarzenberg, were among the first patients who used the gas-baths after their establishment in 1819. The physicians of Marienbad have, ever since the last-mentioned period, employed this remedy in a great number of cases and diseases, and, they informed me, with great advantage. The sensible effects are chiefly as follows: 1. A sensation of heat (sometimes preceded by a slight coldness) very soon is felt after entering the gas-bath, beginning at the feet and mounting upwards over the whole body, in the majority of cases, but, in others, it is most sensibly experienced in those parts of the body or limbs which are or were the seats of diseases. In the abdomen, and especially in the lower parts of the pelvis, this pleasant sensation of heat is more felt than in the chest—a fact which led to the application of gas to certain complaints in both sexes attended with torpor and debility of particular functions. 2. A sensation of twitching, formication, and even pain, is often the result of the gas-bath, especially in parts which have formerly been the seat of fractures, sprains, wounds, or severe gout or rheumatism. These pains are so acute as sometimes to force the patient to quit the bath before the usual time has expired. On the other hand, most excruciating pains of rheumatism, tic, &c. unaccompanied by inflammation, have been instantaneously relieved by the application of the gas. 3. Perspiration is generally produced or augmented by the bath, either at the time of immersion, a few hours afterwards, or in the following night. 4. The gas-bath sometimes brings on, at others regulates, periodical discharges, hæmorrhoidal or otherwise. 5. The gas-bath is exciting or even irritating to the organs of respiration, and should not be used where there is any inflammatory action or congestion in the chest. 6. If a certain proportion of the gas gets mixed with the common air, and is thus breathed, it produces giddiness, vertigo, anguish at the pit of the stomach, and oppression about the lungs. If the _pure gas_ is breathed, instant death is the result. A few years ago the life of a female peasant was lost by the stupidity of her husband, who put the cover of the bath over her head, instead of being round her throat. No one is now allowed to take a gas-bath without the medical or some experienced attendant.[65] The carbonic acid gas is generally employed here in commixture with a small proportion of sulphuretted hydrogen gas.