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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
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
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
