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Show APPENDIX F.- CHEMICAL ANALYSES. 419 of two or three hours during a single day, and allowing it to drain and dry at night, and be spread to the sun an hour or two the following morning. This experiment is successful on a small scale, and will no doubt admit of extended application. The water of the lake examined was perfectly clear, and had the specific gravity of 1.170, water being 1.000. One hundred parts by weight were evaporated to dryness in a water- bath below the boiling point, and then heated to about three hundred degrees of the thermometer, and retained at that heat till the mass ceased to lose any weight. It gave solid contents 22.422, and consisted of Chloride of Sodium 20.196 Sulphate of Soda 1.884 Chloride of Magnesium 0.262 Chloride of Calcium 0. trace. The water of the Warm Spring of Salt Lake City is a Harrow-gate water, abounding in sulphur. The water is very limpid, having a strong smell of sulphuretted hydrogen, and contains the gas both absorbed in the water and also combined with bases. The specific gravity of the water I found to be 1.0112, and, when opened, was highly charged with gas, although the cork had allowed much of the gas, and water even, to escape. One hundred parts of the water were evaporated to dryness at a temperature of about 200° of Fahrenheit, and yielded solid matter 1.082000. The heat necessary for this also carried off sulphuretted hydrogen per cent. 0.037454. One hundred parts of the water gave an analysis of the following results:- Sulphuretted hydrogen absorbed in the water 0.087454 " " combined with bases* 0.000728 Carbonate of lime, precipitated by boiling 0.075000 Carbonate of magnesia, " " 0.022770 Chloride of oalcium 0.005700 Sulphate of soda 0.064835 Chloride of sodium 0.816600 1.023087 * Probably combined with some of the bases and decomposed by the heat used to separate the water in solidifying the contents, as the gas could hardly be detected when the contents were dried. |