ELECTRIC DISCHARGE WITH THE CHLORIDE OF SILVER BATTERY. 
189 
Tube 130, Hydrogen, 
97 . — The tube was exhausted and filled ten times successively with dry hydrogen. 
Pressure 18 m.m., 23684 M, 8040 cells. There were specks of light visible 
at both terminals but the discharge in the tube was non-luminous, great 
heat being developed about the middle of the tube. 
98. — Pressure 137 m.m., 18,026 M, 8040 cells. There was one luminosity at the 
ring positive. Connected with the secondary of an induction coil instead of 
a battery, there was a streamer discharge like that produced under similar 
circumstances in tube 129, 106, fig. 47. 
99. — Pressure 11 ’8 m.m., 15,526 M. Still one luminosity, 8, fig. 49 ; in the rotat- 
ing mirror the reflection appeared like a fine diaper pattern, indicating a 
rapid motion in alternate directions. 
Fig. 49. 
TUBE 130. 
100. — Pressure carried down by successive steps to 5‘6 m.m., 7368 M, 8040 cells. 
The tube was filled with a nebulous discharge crossed by paper-like strati- 
fications, the current was intermittent. The C, F, and G lines visible with 
the spectroscope in the nebulous illumination of the negative terminal, but 
the C and G lines were not visible in the strata; with 700,000 to 900,000 
ohms resistance the nebulous discharge broke up into three distinct 
luminosities. 
101. — Pressure 2’4 m.m,, 3158 M, 3600 rod cells, strata like 17, fig, 49, in shape, 
but closer and agitated ; a flow seen in the mirror towards the positive. 
102. — Without any external leakage, the pressure had increased the following 
day to 3 m.m., 3947 M, 3600 rod cells ; luminosities as depicted in 14, 
fig. 49, extended half the length of the tube towards the positive, the second 
half on the positive side being filled with nebulous ill-defined strata ; the 
discharge on the ring, negative, being cylindrical. 
103. — Pressure 1*2 m.m., 1579 M, 3600 rod cells. This was the first occasion of 
