In this report the relation between the impressed voltage V and the filament current I was investigated, using resistance tubes recently completed. And the power n in the formula V=KυIn was found to distribute between 1.64 and 1.78.
Although these values are slightly apart from the desired value 1.85, we found that these tubes are capable to be applied to practical cases within errors of several percent by the next method.
This method is to compare the calculated values of Kυ and the experimental ones of simple networks of the tubes.