414 
MR. AY. R. CARR ON THE LAAA^S GOVERNING 
Distance lieGveen electrodes 
in millims. 
Discharge pressures in millims. 
of mercury. 
1 
2 
3 
5 
10 
47 
2-4 
17 
•94 
'51 
the pressures being in the ratio 9-3 : 4‘8 : 3‘3 : 1-9 : 1. 
The minimum spark potential in h 3 ulrogen was about 280 volts, and the critical 
pressures corresponding to the difterent spark lengths were : 
1 )istance bet\veen electrodes 
in millims. 
1 
2 
3 
5 
10 
where the various discharge pressures 
the distance between the electrodes. 
Discharge pressures in millims. 
of merciuy. 
10-3 
5-93 
4-02 
2-80 
1-46 
are once more nearl}^ inversely proportional to 
