Force and Osmotic Pressure. 

 Wriqlit and Thomson's observations. 



387 



wZnCl.,4- 



E.M.F. 



gm.-equiv./litre. 



logO 



E.M.F. from 





100H 2 O. 

 n= 0-172 



B. A. volts. 



1000 C. 



= -4/. 



Volts XlO-4. 





0-2590 



0-1909 



4-28076 



- 233 



B.A. volt taken as 



025 



0-2541 



0-2775 



4-44330 



184 



0-9867 volt. 



0-754 



2397 



8340 



4-92115 



40 



By interpolation 



2-04 



0-2181 



2-211 



3-34460 



4- 176 



normal solution 



3-3 



0-2071 



3412 



3-53296 



286 



lies 0-0040 volt 



61 



0-1863 



6-115 



378639 



494 



above - 754 solu- 



9-8 



0-1120 



9-132 



3-96056 



1237 



tion. 



244 





17-58* 



•z-24511 



2357 



* extrapolated. 



Concentration-cells without migration 

 Helmholtz' s observation. 



Mass of 



water to 1 g. 



ZnCL. 



9-1992 



0-8 



E.M.F. in 



calomel 

 cells. 



0-11541 



gm.-equiv./litre. 

 1000 C. 



1-574 



13-00 



logC 

 = -*• 



319700 



2-13354 



E.M.F. in 

 volts X 10-4. 



1165-4 



Calomel cell taken 

 by Helmholtz at 

 1-043 volts on the 

 assumption that 

 the Siemens unit 

 = 0-9717". But 

 it is really 

 = 0-9407". 





Moser' 



s observation. 











E.M.F. in 

 Daniells. 



gm.-equiv./litre. 

 1000 C. 



logC 

 = -*//. 



E.M.F. in" j 

 volts X 10-4 



ZnCl.,4- 



750H 2 O. 

 ZnCl 2 4- 



IOOH.,0. 



0516 



0-1495 

 1-102 



4-17464 

 304222 



557 





Goodwin's 



observations. 







gm.-equiv./litre. 

 1000 0. 



lo g C=-f 



E.M.F. 



Volts x 10- 4. 





0-2 to 0-02 

 0-1 to 001 

 002 to 0-002 

 0-01 to 0001 



1 



4-301 to 5-301 

 4-000 to 5-000 

 5 301 to 6301 

 5-000 to 6-000 



777 

 790 

 843 

 854 



Partly with Hg 2 Cl,; 

 partly with AgCl 

 as depolarisator. 



