268 



BACON. 



inside, as it is made of metal and ground glass. The results obtained 



are as follows: 



I. — In the dark. 



February 21 . 

 February 22 . 

 February 24 



March 4 



March 7 



Date. 



Time. 



p. m. 



9.45 

 10. 15 



9.30 

 10.30 



9.18 

 10.18 



9.00 

 10. 15 



9.30 

 10.30 



Poten- 

 tial, elec- 

 troscope. 



Fall, 



yolts per 



hour. 



Air cur- 

 rent per 

 hour. 



141.3 

 138.3 



1 



6.0 



205.4 

 199.5 



1 



5.9 



218.9 

 212.3 



) 



6.6 



208.8 

 199.5 



1 



7.4 



215.6 

 209.9 



} 



5.7 



Liters. 

 1,000 



1,000 



1,000 



1,000 



1,000 



The average rate of fall for darkness, therefore, for a gas current of 1,000 

 liters per hour, was 6.3 volts. 



II. — In the diffuse light of the laboratory. 



February 8 . 



February 9 . 



February 12 . 



Date. 



Time. 



Poten- 

 tial, elec- 

 troscope 



p. m. 



1.58 



2.58 



a. m. 



8.15 



8.45 



8.45 



9.15 



10.16 



10.46 



10. 56 



11.16 



161.1 

 147.9 



162.9 

 154.8 

 154.8 

 146.5 

 149.9 

 144.0 

 141.9 

 135. 9 



Fall, 



volts per 



hour. 



13.2 



14.2 

 16.6 

 11.8 

 18.0 



Air 



current 



per hour. 



Liters. 

 900 



1,000 



■1,000 



170 



1,200 



Average for diffuse light, 15.6 volts. 



