(A 



E 



M 

 T3 



C 

 O 

 M 



I- 



LlI 



220- 



200- 



180- 



160- 



140- 



120- 



100- 



80- 



60- 



40- 



20- 



8 12 16 20 



CONCENTRATION OF SALT 



(ppm) 



Figure l.--The effects of cattle salt on the resistivities of various water 

 samples. The results in Samples K and L; I and J; F, G, and 

 H; and C and E listed in table 1 were averaged. Test N was 

 made with a sample of deionized water for comparison 



