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1.2 0.8 I.O 1.2 



ELECTRODE GROUND VOLTAGE (VOLTS) 



NORMAL VOLTAGE FOR SEA ELECTRODES 

 M AND FOR LAND ELECTRODES 

 DURING SUMMER PERIOD 



Figure 9. Relation between accumulated degree days belo 

 land silver/silver chloride electrode and earth ground. 



A. Period 17 October 1952 to 1 August 1953. 



B. Period 22 October 1953 to 1 August 1954. 



C. Period 7 October 1954 to 1 August 1955. 



32 °F and potential measured between 



12 



