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 1.834 



Chloride of Magnesium 0.252 



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 : — 



Svdphuretted hydrogen absorbed in the water 0.037454 



<' << combined with bases*..- 0.000728 



Carbonate of lime, precipitated by boiling 0.075000 



Carbonate of magnesia, " *' 0.022770 



Chloride of calcium 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 de- 

 tected when the contents were dried. 



