ABSTRACTS OF TECHNICAL ARTICLES 115 



The effect of variations in methods and conditions of test is studied. 

 The rate of diffusion through a water-sorbing material such as rubber 

 does not obey Pick's law when under diffusion conditions favoring high 

 water sorption. 



V^arious concepts involving sorption and diffusion processes are dis- 

 cussed as bearing upon the mechanism of the diffusion of water through 

 organic substances. 



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