236 Mr Barlow, On the Osmotic Pressure of Aqueous Solutions. 



outer vessel with the same electrodes, was 42000 ohms. The 

 constant (= - 139) of the electrolytic cell was therefore used in the 

 conductivities given below, from which values Curve I is drawn. 

 These are corrected to 10° "4 C. 



. , , ... cell constant *139 





"' VJ experimental resistance R 



Date 



Conductivity 





Conductivity 



at 10°-4 C. 





at 10°-4 C. 



Jan. 27 



3-3. 10- 6 



Feb. 1 



8-62. 10- 6 



„ 28 



4-63 



„ 3 



10-23 



„ 30 



6-63 



„ 4 



10-60 



„ 31 



7-75 



„ 6 



11-64 







„ 7 



12-00 



Cdeve I. Change of conductivity of outer water. 



Conduct 



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The apparatus was taken down in order to add fresh redistilled 

 water and to examine the working of the commutator. The 

 contacts of this were cleaned and readjusted, and its working 

 tested by using a coil in the place of the cell-resistance. The 

 readings were taken, as throughout, for the resistance and the 

 battery reversed. For the coil, the mean resistance with the 



