26 



HATCH EXPERIMENT STATION. 



[Jan. 



Table V. — Records showing the Electrical Potential ( Volts) taken from 

 an Elui Tree and from Free Air — Continued. 



[Collector III., 12 feet high, in Norway spruce. Nos. IV. and V., readings taken from 

 copper plates in soil. Time of obsers-atiou, 3 P.M.] 



