ELECTRIC DISCHARGE WITH THE CHLORIDE OE SILVER BATTERY. 197 
from the positive and absorbed it, leaving two. The current of 5640 cells 
would not pass. Similar phenomena were observed when the pressure had 
been lowered to 3’8 m.m., 5000 M. 
155. — Nothing worth noting occurred until the pressure had been lowered to 
2T m.m., 2763 M ; the current of 3600 cells passed, producing an agitated 
discharge : the introduction of 50,000 ohms made the discharge steady, and 
two luminosities, 6, fig. 52, were produced; these pulsated and coalesced 
to form one, then separated into two ; this phenomenon was repeated 
rythmically at regular intervals. 
156. — Pressure 1*1 m.m., 1447 M. 2400 rod cells would not pass, but with 
3600 there was a continuous luminosity nearly filling the bore of the tube 
to within a short distance of the negative ring, where there were three 
strata, 8, fig. 52. 
157. — A slight increase of pressure without leakage ; pressure 1'2 m.m., 1579 M, 
3240 powder cells. A rapidly flowing stratification from the negative towards 
the positive, 9, fig. 52. 
Tube 132, 1st Charge of Hydrogen. 
158. — The tube was filled with hydrogen and exhausted at first with the water 
trompe, which reduced the pressure to within 12 m.m., 15,789 M of the 
barometer. The tube was washed out several times with hydrogen and 
exhausted between each filling. 
159. — Pressure 16‘2 m.m., 21,316 M. The current of 8040 cells passed illumi- 
nating the terminals. 
Fig. 53. 
160. — Pressure 6‘9 m.m., 9079 M. 5640 cells produced five luminosities, as 9, 
fig. 53, which after a time fell off to three, and were slightly trembling. 
Compare this phase with 1, fig. 52, when at nearly the same pressure the 
tube was charged with air. The discharges were all agitated, even when the 
pressure had been reduced to 1 m.m. The cause of this was found to be a 
broken cell in one of the batteries. 
