Emanation Content of Certain Springs, 817 



Elevation 820 feet. The two springs are about 1*3 miles 

 apart. 



Each has an average flow of from 10,000 to 40,000 gallons 

 per day. The How of both springs is affected by the rainfall. 

 The 1 Lottie spring issues from a crevice in the solid rook. 

 The 111. Cent, spring issues through coarse gravel or 

 stones. 



The measurements are given in table form. The date, 

 the temperature of the spring, the flow in gallons per day, 

 and the emanation content per litre of water is given for the 

 two springs. 



The variation of the radioactivity with the variation o\' the 

 flow is bettor shown in graphic form. The diagram shows the 

 flow of the 111. Cent, spring and the radioactivity oi' the two 

 springs. The flow oi' the Mottle spring varies in the same 

 manner as the tlow of the 111. Cent, spring, but not through 

 so great a range. The radioactivity o( the Bottle spring is 

 also more constant than the 111. Cent, spring, although its 

 variation is about W00 per cent. 



N t .3 11 B9 IX 89 B - 11 1 IS 



•1 •» 1* 4 10 1 15 29 13 27 10 8 

 Sept. Cot. Nov. D*e. Jan . Fot . Hkrch. April. Kay. Juna. July 



In every case the radioactivity increases as the flow 

 increases ; the maximum values being obtained during a 

 wet season. 



These results, together with measurements of a great many 

 other springs, indicate that the radioactivity of springs in 



