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Such a person will not neglect long to remove the impurities which accumulate so readily on the surface of his body, or suffer himself to use food or drink which induces flatulence, and thus exposes either his intestines or his lungs, or the lungs of others, to that most extremely poisonous agent, sulphureted hydrogen gas.
Gradually Kennedy led the conversation around to the point which he wanted, and asked, "I wish you'd let me fix up a little sulphureted hydrogen." "Go ahead," granted the druggist good-naturedly. "I guess you can do it. You know as much about drugs as I do. I can stand the smell, if you can." Kennedy smiled and set to work.
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 waded a long way among the reeds in water breast deep, but always found a broad, deep space free from vegetation and unfordable. A peculiar kind of lichen, which grows on the surface of the soil, becomes detached and floats on the water, giving out a very disagreeable odor, like sulphureted hydrogen, in some of these stagnant waters.
When I tested it for sulphureted hydrogen and for ammonia, both were indicated in such an unmistakable manner as none of us would care to see in our coal gas as sent out to the consumer.
It was flooded, not by the river, but by the heavy rains which poured down every day, and kept those who had clothing constantly wet. I observed, in this piece of forest, a very strong smell of sulphureted hydrogen. This I had observed repeatedly in other parts before. I had attacks of fever of the intermittent type again and again, in consequence of repeated drenchings in these unhealthy spots.
However, by the addition of a weak solution of gum in alcohol or other suitable sizing to the composition, it may be used with paints containing elements sensitive to sulphureted hydrogen without danger of decomposing them and destroying their color.
The one objection to its use is that silver likes to unite with sulphur, and thus the silver easily becomes black. There is sulphur in the yolk of an egg and that is why the spoon with which it has been eaten turns black. Even if silverware is not used, it tarnishes, especially in towns, because there is so much sulphureted hydrogen in the air. In perfectly pure air, it would not tarnish.
In five minutes we had seen, handled, and smelt enough to satisfy us with this very odd and very nasty vagary of tropic nature; and as we did not wish to become faint and ill between the sulphureted hydrogen and the blaze of the sun reflected off the hot black pitch, we hurried on over the water-furrows, and through the sedge-beds to the farther shore to find ourselves, in a single step, out of an Inferno into a Paradise.
The reagents available for the reduction of iron are stannous chloride, sulphurous acid, sulphureted hydrogen, and zinc; of these stannous chloride acts most readily, the completion of the reaction is most easily noted, and the excess of the reagent is most readily removed.
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