334 THE EARL OF BERKELEY, MESSRS. E. G. J. HARTLEY AND J. STEPHENSON 



which column (l) gives the weight concentration ; (2) the number of douhle gram- 

 molecules in the litre of solution (=N); (3) the equivalent conductivity of the 

 solution (=/"); (4) the ratio fj./fjt- x , where /A M is the equivalent conductivity at infinite 



09 



08 



07 



06 



05 



04 



\ \ 



\ \ Abscissas are the cube root of the number of grains, of 



\ \ anhydrous salt in too gra. solution. 



\ \ Curve (i) refers to the calcium solutions. 



Ordinates are the equivalent conductivities.' 



\\ 



(2) 



strontium 



\Y 



\ \ 



\ \ 



-^ \ \ 



;v 



X \ 



\ 



Diagram 2. 



dilution, and is assumed to be the mean of the limits given by the curves on diagram 

 (2) ; (5) gives the osmotic pressure (= P) calculated from the well-known equation 



