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Bath water should be 226°F. In 1864 W. W, Smyth, M.A.,. 
F.B.S., F.G.S., in his report to the Geological department of the 
British Association, on the Thermal water of the Clifford 
Amalgamated Mines of Cornwall makes this statement : “‘ An 
increase of depth of 180 feet in the point of issue of the water 
had raised the temperature 8°F'., showing the remarkable increase 
of 1 degree in 224 feet.” 
This, is a deeply interesting and valuable report ; inasmuch, as. 
the information it contains of the thermal Spring in Wheel 
_ Clifford mine, is in many respects applicable to the thermal springs 
at Bath. The geological conditions under which the Cornish 
' spring rises are almost identical with the geological conditions. 
of our springs. 
It is a grand discovery, that a thermal spring at 1,500 feet. 
deep, should be found to increase in heat 8°F. at an additional 
depth of 180 feet; if we calculate the heat of the Bath water 
after this rate, it will treble its present temperature. 
I think we shall find but little difficulty in arriving at the 
conclusion that our hot springs as they issue from their limestone 
channel are 70 to 100 per cent. hotter than they are at the surface ;. 
that in their upward current the coming in contact with cold 
ordinary spring water from the Dolomitic Conglomerate has a far: 
- more injurious effect on their valuable properties by precipitation, 
than by its diluting effect. Geologically, there is not the slightest 
- reason why that high temperature should not be maintained to 
_ within 207 feet of the surface, and up to that point the water 
hold in solution as great a wealth of lithium as that found in the 
Cornish spring, which may be precipitated the moment the water 
becomes chilled. 
