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BULLETIN OF THE BUREAU OF FISHERIES 



resistivity 12.3 times that of the lowest stream-water resistivity found. The highest 

 resistivity river water had a resistivity 880 times that of sea water. In spite of 

 this wide variation in resistivity, the temperature-resistivity curves for waters from 

 all of the 16 sources of water studied can be represented over the range of temper- 



Fig. 20 



ature from 40 to 100° F. by the equation 



where p = the resistivity in ohms per inch cube, A = & constant different for each 

 kind of water (see Table 5), e = 2.7183 base of Naperian logarithms, and 6 = the 

 water temperature in degrees Fahrenheit, 



