I50 



NA TURE 



{June 17, 1:^8; 



a pressure of o'642 mm., 1,082 M, was reached, the tube- rose, and, at 8-6 M, it required a potential of 8,937 eel's 

 potential being then only 430 cells, after which it rapidly 1 to jiroduce a discharge. From the experiments described 



in a previous paper it was found that, in another tube, it [ chirge at 3 M, and that, at 18 M, this potential was 

 required the full potential of 1 1,000 cells to produce a dis- I insufficient. The obstruction to the discharge in tube 



A — B rt presents an assumed r 



: of the molecules at a pressure of 5 millionths of an atmosphere. A' to 10, A' to : 

 corresponding distances at pressures lo, 20, 40960 millijnths. 



162 was as great at 8 6M as at 28,553 M pressure, and [ The diagram (No. I.) laid down from the results when 

 required 8,950 cells in each case. I the ring was made positive, shows the curve of the obser- 



