3- 



a 



430 



Dr. F. Gr. Donnan on the Relative Rates of 



gas admitted to the reservoir by opening the tap I. On its 

 way thither it was filtered through the cotton-wool plug r. 

 The gas was allowed to enter until the mercury in the gauge 

 rose to a certain fixed scale-division n % . It was easy to adjust 



ifh 



f- 



777- 



h 



n 



f* 



% 



n 



y 



I 



d 



r 



I 



H§= 



■W/ 



df 



4^ 



i 



this accurately, provided the capillary had been drawn out fine 

 enough ; and in any case small inaccuracies in this adjustment 

 are absolutely without effect on the measurements, as is fore- 

 seen from the theory and as will be confirmed later on. The 



