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Updated: May 16, 2025
The supply of pure air obtained by that mode of ventilation was sufficient to dilute the cause of the disease, so that it became powerless." Sulphureted hydrogen gas is also exceedingly poisonous to the lungs and to every part of the system. When pure, this gas is described as instantly fatal to animal life.
If it is designed to mix the composition with paints, those composed of zinc-white and baryta should be chosen in preference to those composed of white lead and colored by vegetable matter, as chemical action will take place between the composition and paint last mentioned, and its color will be destroyed or changed by the gradual action of the sulphureted hydrogen produced.
The absence of sulphureted hydrogen in samples of unfiltered effluent, which have been kept for about six weeks in stoppered bottles, is also a fact of importance. The settled sewage was not in this condition, as it rapidly underwent putrefaction, even in contact with air, in two or three days.
Here the juice was extracted by a rude press, and put in bottles until it fermented and became worse in odor than sulphureted hydrogen.
Hydrogen sulphide may be prepared very easily, and sufficiently pure for ordinary analytical purposes, by passing coal-gas through boiling sulphur. Coal-gas contains 40 to 50 per cent, of hydrogen, nearly the whole of which may, by means of a suitable arrangement, be converted into sulphureted hydrogen.
The speed of the current may be regulated by the tap, and as the aspirator itself acts as a receptacle for excess of gas, very little as a rule escapes into the room, and consequently unpleasant smells are avoided. This method of preparing sulphureted hydrogen will, I think, be found useful in the laboratory. It is cleanly, much cheaper than the ordinary method, and very convenient.
Here the juice was extracted by a rude press, and put in bottles until it fermented and became worse in odor than sulphureted hydrogen.
We found many patches of stagnant water, which, when disturbed by our passing through them, evolved strong effluvia of sulphureted hydrogen. At other times these spots exhibit an efflorescence of the nitrate of soda; they also contain abundance of lime, probably from decaying vegetable matter, and from these may have emanated the malaria which caused the present sickness.
Paris refers to the case of a chemist of his acquaintance, who was suddenly deprived of sense as he stood over a pneumatic trough in which he was collecting this gas. From the experiments of Dupuytren and Thenard, air that contains a thousandth part of sulphureted hydrogen kills birds immediately.
Then whish, roar, eclipse, darkness and sulphureted hydrogen! we would dive into another tunnel and out again gasping on a breathtaking panorama of mountains.
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