1905.] 



PUBLIC DOCUMENT — Xo. ,38. 



25 



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

 an Elm Tree and from Free Air — Continued. 



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

 copper i)lates in soil. Time of observation, 'J a.m.] 



