ELECTRICAL CONDUCTIVITY OF COTTON 



435 



First Cycle of Decreasing Humidity — Desorption 



Samples dried 20 hours with dry air at 25° C. 



Second Cycle of Increasing Humidity — A bsorption 



26.2 

 36.2 



56.5 



71.5 (2 hours) 



72.5 (overnight — 18 hours) 



Saturated air (6 hours exposure) 



1.11 xio^ 

 1.39X10'= 

 3.87X10-' 

 3.34 XlO' 

 2.79 XlO^ 

 2.64 



7.05 

 6.14 

 4.59 

 3.52 

 3.45 

 0.42 



Second Cycle of Decreasing Humidity — Desorption 



45.0 (2 hours) 



45.0 (overnight — 18 hours) 

 17.6 



6.24X10^ 

 6.97x10^ 

 1.91 XlO" 



4.80 

 4.84 

 7.28 



Samples dried 20 hours with dry air at 25° C. 



Third Cycle of Increasing Humidity — Absorption 



26.2 



3.J 



0.589 9.95 XlO« 



7.00 



Desorption from 26.2% to 5% Relative Humidity 



5.0 1.72 0.236 



5.67 Xl0» 8.75 



Samples removed from apparatus and oven-dried at 80° C. for 20 hours. 

 First Cycle of Increasing Humidity — after oven-drying 



45.7 



5.07 



0.705 



4.76x105 



5.68 



" Under the "saturated" condition in this case, moisture as dew was visible on 

 the cotton. 



