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This page contains a formula or preparation using substances now known to be dangerously toxic, such as arsenic, mercury, lead, or cyanide compounds. Exposure to these substances can cause severe poisoning, permanent injury, or death.
In addition, this page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
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Dilute Hydriodic Acid
Take 1 troy ounce iodine in fine powder. Mix 30 grains of the iodine with 5 fluid ounces distilled water in a tall glass-stoppered 1/2 pint bottle, and pass into the mixture hydrosul- drate. phuric acid gas until the color of the iodine 3980. Tests for Soda. The flame of entirely disappears, and a turbid liquid re- burning alcohol containing soda is of a yellow mains. Next, gradually add the remainder of color. Hydrate of soda, after it has delithe iodine, stirring at the same time. Again quesced in the air, speedily resolidifies by the pass the gas through the liquid until it be- absorption of carbonic acid, forming carbonate comes colorless, and decant it into a small of soda, a salt marked by being easily crysmatrass which it must nearly fill; boil it untallizable, and rapidly efflorescing in dry air. til it ceases to give off the odor of hydrosul- In solution, soda is not precipitated by tarphuric acid, and filter through paper, passing sufficient distilled water through the filter to bring the filtered liquid to 6 fluid ounces.
Keep it in a well-stoppered bottle.(U. S.
Ph.) taric acid. With sulphuric acid it yields a salt, which by its taste (intensely bitter) and form (six-sided prisms, transparent, and extremely efflorescent) is casily recognized as sulphate of soda (Glauber's salt).
ALKALIES.