DOLOMIZATION. 213 
very recent period. The existing springs follow by preference the vertical 
fractures, along which they appear originally to rise, but also follow porous 
zones in the bedding. At the main spring, which is called the Yampa, the 
water apparently rises in the strongly fractured zone which has been men- 
tioned. According to the prospectus of the Colorado Hotel, which is built 
near this spring, the Yampa spring has a flow of 2,000 gallons per minute, 
and has a temperature of 120° F. The following analysis of the waters of 
this spring by Dr. Charles F. Chandler, of New York, is taken from this 
prospectus: 
Analysis of water from Yampa Spring, Glenwood Springs, Colorado. 
[In one United States gallon (281 inches). ] 
Grains. 
Chloride of sodium_______.-___..---___---| 1,089. 8307 
Chloride of magnesium_...___._.._-_-___- 13. 0994 
iBromidejorsoditmmipes ss oes eae eee 0. 5635 
Nodidexofysoditiamee eens Trace. 
Mivoridelofscal cium pss === Trace. 
Sulphate of potassium. ____-__----------.- 24. 0484 
Sulphatetofelim ees ese reee sane aee 92. 3861 
Bicarbonatelonlithian=---42222-4-- 5-2 0. 2209 
Bicarbonate of magnesia ____---___._____- 13. 5532 
Bicarbonate of lime ___________.___._.___. 24. 3727 
Bicarbonate of iron__.__.__-----_---__-_.- Trace. 
Bicarbonate of soda._ ___________-.-.___- Trace. 
Phosphate of soda___ -__--__-_., ---____._- Trace. 
PNlkpbadubayre ees Se ees a ae eee aoe Trace. 
Sil C alee pester et eee) eee Re I ot 1.9712 
Organicematterjassesee nee eee eee Trace. 
Total -____ J egseee ese H ee eee eee 1, 250. 0411 
Besides the salts mentioned in the analysis, the water gives off various 
gases, among which sulphureted hydrogen and carbon dioxide are par- 
ticularly noticeable. At the time of examination an artificial cave was 
being constructed along one of the small feeders to the main spring for the 
purpose of furnishing Turkish baths. When visited, the temperature in 
this cave with entrance open was 110°. With the entrance closed it is said 
to be 130° or 182°. In the bottom of this artificial cave hot sulphur water 
