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Page:Popular Science Monthly Volume 19.djvu/252

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240
THE POPULAR SCIENCE MONTHLY.

tained in treating the natural waters. One or two hundred grammes (three and a half to seven ounces) of tilled earth mixed with a pint of

PSM V19 D252 Crystals of iodoform obtained with rain water.jpg
Fig. 3.—Crystals of Iodoform obtained with Rain-water.

water gave a similar precipitate of iodoform when distilled and exposed to the reactions employed in the other experiments. The precipitation

PSM V19 D252 Crystals of iodoform obtained with snow water.jpg
Fig. 4.—Crystals of Iodoform obtained with Snow-water.

of iodoform by the addition of iodine and carbonate of soda is a very evident test of the presence of alcohol. Iodoform