468 



tion it must lose some of the emanation. This may explain the variation of 

 springs in the same locality. 



Observations made at the spring simply show the emanation content 

 of the water. This may be clue to three things. The emanation which is 

 continually forming from traces of radium in the soil and rocks through which 

 and over which the water passes is dissolved in the water and passes out with 

 the water. It may be due to radium salts dissolved in the water. Or it may 

 be due to some product of the thorium or actinium series. In the first case 

 the water will show radioactivity by the emanation method and after stand- 

 ing in a closed vessel for a month will not show any emanation. In the second 

 case it may show radioactivity the same day as taken from the spring and 

 after standing a month in a closed vessel it will show more or less emanation 

 than at first. In any case the emanation content after standing one month 

 is equal to the amount of radium dissolved in the water, since one curie is 

 the amount of emanation which is in equilibrium with one gram of radium. 



All the observations given below are for the emanation content of the 

 water as taken from the spring or well. These observations were taken from 

 time to time on various springs and wells in Indiana and Ohio. The date 

 of observation, approximate location of the spring, and temperature of the 

 water at the spring is given. 



TABLE 5. 

 Springs. 



Xame. 



111. Cent.... 



Youno 



J.C.S 



J. C. S. Old 



l.C.S 



ill. Cent.... 



Stone 



v/eimer. . . . 



Hottle 



South 



C. McQ.... 



f. B 



C. D. McQ. 

 C. D. McQ 

 W. P. McQ. 



C. W 



Tal. No. 1. 

 Tal. Upper. 



Location. 



Date. 



Bloomington Mar. 4, 1914. 



Brown County, Indiana Mar. 6, 1914. 



Two miles southeast of Bloomington Mar. 13, 1914. 



Two miles southeast of Bloomington Mar. 14, 1914. 



Two miles southeast of Bloomington ; May 16, 1914. 



Bloomington. . . J May 23, 1914. 



May 23, 1914. 



May 23, 1914. 



Sept. 24, 1914. 



Aug. 24, 1914. 



Sept 2, 1914. 



Sept. 7, 1914. 



Sept. 7, 1914. 



Sept. 7, 1914. 



Sept. 7, 1914. 



Sept, 7, 1914. 



Sept. 7, 1914. 



Sept. 7, 1914. 



Two miles southwest of Bloomington. . . 

 Three miles southwest of Bloomington. 



Bloomington 



Morning Sun, Ohio 



One mile southeast of Morning Sun 



One-half mile west of Morning Sun. . . 



One mile west of Morning Sun 



(Wood) one mile west of Morning Sun. . 



One mile west of Morning Sun 



Two miles west of Morning Sun 



One mile northeast Col. CO 



One mile northeast Col. CO 



Temp. C. 



Curies, 



Per 

 Liter. 



12.5° 

 16° 

 10. 3 C 

 11.5° 

 11.5° 

 12. 2 C 

 11.° 

 12.3° 

 13." 

 13° 

 16.° 



15.8° 



19.5° 



17.° 



19.5° 



17.° 



17.° 



600. X10- 



355 

 430 

 660 

 170 

 265 

 77 

 175 

 650 

 420 

 560 

 100 

 250 

 300 

 610 

 140 

 350 

 350 



