1 ■'.") 



1 •>_ 



IEEDINGS OF THE AMERICAN ACADEMY. 



•8. Through tl toppers ran tbe tubes for supplying the 



hydrogen used to exclude oxygen from the process, as well as the sup- 



FlGURE 4. 



ports for (ho electrodes. Two anodes | B and C) were used in each cell, 

 and in all except the earliest experiments t lie cathodes (A) were of 

 platinum. A diagram, Figure 4, while illustrating a later modification, 



