276 



BACON. 





Volts 



Volts. 



per hour 



147.9 



115.2 



138.3 



28.8 



135.9 



13.8 



133.6 





132.7 



5.4 



114.9 



6.9 



3. Manila hydrant water, February 4. 



Time, 

 (p. m.) 



9.03 



9.08 



9.13 



9.23 . 



9.33 

 11.33 



The water is active. 



4. Barium sulphate precipitate formed in the water (Experiment 1) from the 

 boiling crater lake of Taal Volcano. 



Time, 

 (p. m.) 



8.42 



9.42 



Slight activity. Agrees well with Experiment 1. 



5. Barium sulphate precipitate formed in 0.5 liter of water from the yellow 

 lake of the crater of Taal Volcano. Water which had stood for about two years 

 in a well-stoppered bottle in the laboratory. 





Volts 



Volts. 



per hour 



144.51 





134.71 



9.8 



Time. 



(p. m.) 

 1.10 

 2.10 



Volts. 

 149.9 

 144.5 



Volts 

 per hour. 



5.40 



Very slightly active. 



6. Barium sulphate precipitate from 0.5 liter of water from the green lake of 

 the crater of Taal Volcano, collected at the same time as waters Nos. 1 and 5. 



Time, 

 (p. m.) 



2.10 

 2.10 

 3.10 



Volts. 



184.9 

 180.9 



Volts 

 per hour. 



4.0 



No activity. 



7. Distilled water employed in the usual manner to test apparatus. 



Time. 

 (p. m.) 



2.47 



3.02 



(a. m.) 



Volts. 

 131.8 

 131.8 



Volts 

 per hour. 



7.6 



7.2 



8.22 155.41 



8.37 153.6] 



No activity. 



8. One hundred cubic centimeters of rain water collected from the roof of 

 the Bureau of Science building after several hours of rain February 11. Evapo- 

 rated to dryness in a platinum dish, and the dish tested in the apparatus. 

 Measurements were made about one hour after the rain had fallen. 



Time, 

 (a. m.) 



9.21 



9.41 



Volts. 

 131.8 

 127.6 



Volts 

 per hour. 



12.6 



