August 28, 1890] 



NATURE 



425 



can get the resistance at the moment of break. 

 is delicate, and seems to have yielded good 



The method lack of time has prevented this section being dealt with 

 results ; but with other than one set of current values, f^" f '. '" - 



Charging with Ampera 



Imt in Hours ff-om Beginning of Charge 

 Fiu. 4. 



Discharging with 10 Amperes. 



77/776 in Hours ftom Beginning or Discharge 



Fic. 5. 



We print the curves given in the paper for resistance I The paper seems, on the whole, a useful and suggestive- 

 on charge and discharge. contribution to the current knowledge on the.subject. 



NO. 1087, VOL. 42] 



