1880.] Strained Material, Ley den Jars, and Voltameters. 431 



Time in minutes 



from the moment 



Observed 



u' calculated from 



Difference 



of discharging. 



current u. 



the formula. 



{u-u'). 



19 



10-8 



10-8 



o-o 



20 



10-2 



10-2 



o-o 



21 



97 



... 97 



o-o 



22 



9-2 



9-2 



o-o 



23 



87 



87 



o-o 



24 



8-2 



8-2 



o-o 



25 



7-8 



7-8 



o-o 



If the platinums after absorbing gas were merely kept for a long 

 time in the vacuous space above the distilled water, but not heated to 

 assist the driving out of the gas, then after raising the water to sur- 

 round the wires, the charge current as observed on applying the 

 Minotto's cell is given under u in the following table ; while u' is cal- 

 culated from 



^=96-3 + 79-43 6 -°' 6 «, 



which is the solution of the differential equation, and which represents 

 the charging phenomena almost from the moment of applying the 

 Minotto's cell. 



Charging ; Gas-freed Distilled Water, Platinum Spirals not heated. 



August, 1876. 



Time in 



Observed 



u' calculated from 



Difference 



minutes. 



current u. 



the formula. 



{u-u'). 



0-5 



165-0 



153-9 



11-1 



1 



138-5 



138-1 



0-4 



2 



118-0 



118-3 



-0-3 



3 



107-5 



107-9 



-0-4 



4 



102-4 



102-4 



o-o 



5 



99-5 



99-5 



o-o 



6 



98-0 



98-0 



o-o 



7 



97-2 



97-2 



o-o 



8 



96-7 



96-7 



o-o 



• 9 



96-5 



96-5 



o-o 



When the distilled -water and the platinum spirals were throughly 

 aerated, the charging current measured experimentally is shown under 

 u in the following table ; while u 1 is calculated from 



u' =40-25 +10r25 6 -°' 08 7*. 



