489 
VARIATION OF THE EMANATION CONTENT OF CERTAIN 
SPRINGS. 
R. R. RAMSEY. 
While measuring the radioactivity of springs in the neighborhocd 
of Bloomington, Indiana, I found that the measurements made at certain 
times did not agree with those made at other times. ‘The discrepancy 
was so great I set out to see if the difference was due to errors or was 
a real difference. I selected two springs and have tested them once a week 
for about three months. One, the Hottle Spring, is due north of the 
square near the corporation line. The other is due west of the square a 
little beyond the corporation line, across the Illinois Central Railroad from 
the railroad pumping station. These springs are 1.5 miles apart. Each 
has a flow of abut 15,000 gallons per day. The flow of the Illinois 
Central Spring has perceptibly lowered during October and November. 
The Illinois Central Spring issues from the ground at the root of a beech 
tree through coarse gravel or stones. The Hottle Spring issues from a 
crack in solid rock. 
The results are shown in the following table: 
VARIATION OF EMANATION CONTENT OF CERTAIN SPRINGS NE\R Bioomrneaton, IND. EXPRESSED IN 
Curtms PER LITER. 
Date. Temp. C. Ajax Ore Se Hottle. Ill. Cent. 
| 
Mar. 4 12.0° X 10-2 X 10? | 600. X 10-2 
Mar. 13 10.3° 430. ee Sie yf 
May 16 iL Gs 170. Bee, ae bee reenter cia ee 
May 23 12.2° I ek ree Hee ax | 265. 
July 24 rere ee Y ee > Gomis Bet | 380. 
Aug. 5 12.5° 495. Pa aa ae are oer 
Sept. 24 13 and 13° sh ; 650. 445. 
Oct. 9 15° 530. Saftey | miles 
Oct. 16 13 and 12.8° ; 695. | 166. 
Oct. 23 13.3 and 13° et 700. ' 120. 
Oct. 30 13 and 12.7° iS ae 665. 20. 
Nov. 6 13 and 12.6° 650. 40. 
Nov. 13 13 and 12.6° - a 705. | 20. 
Noy. 20 13 nd 13° ae al 520. ie 
Nov. 26 13 and 13° Rh ne Ae te 550. 33. 
Dec. 3 i fStandelsis |e Nae eee ot sph) 60. 
Dee. 11 13 and 13° : Pe eee | 510. | 20. 
Dec. 18 13 and 13° Beene ee ee tae 450. | 00. 
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