L. J. Wild 



159 



From a theoretical standpoint we thus arrive at a somewhat 

 unsatisfactory position. The authors of the method seem to have 

 recognised this and lay down the condition that for practical purposes 

 "the concentration of the initial solution should not be much below 



•20 



•014 -015 -016 -017 -018 019 



Initial concentration 

 Fig. 1. 



020 -021 '022 023 -024 -025 026 -027 



■SoT-O^ Oil -012 -013 -014 -015 016 -017 -018 -019 -020 -021 -022 

 Initial concentration 

 Fig. 2. 



N/50 strength." They further demonstrate that using solution of this 

 concentration and allowing 3 hours as the period of digestion their 

 method gives results agreeing satisfactorily with the more laborious 

 methods previously employed, such as those of Jones, of Hopkms, of 

 Lyon and Bizzell, and of Veitch. 



