MR. F. F, SMITH ON THE CONSTRUCTION OF 



TABLE V. Observations : June and July, 1903. 



On the whole, the measurements made by the double bridge and the potentiometer 

 are in good agreement. Where a considerable difference exists, more weight must 

 be given to the Kelvin bridge observations, since, occasionally, balancing by the 

 potentiometer im-thod was troublesome as a consequence of slightly varying currents. 



