ELECTRIC DISCHARGE WITH THE CHLORIDE OF SILVER BATTERY. 
179 
fig. 45, shows the appearance when the straight wire was negative, and a 
when it was positive. For a few seconds about 15 strata at the positive 
end became pink, all the others being grey ; afterwards the strata in the 
middle of the tube were grey, those at each end being pink. The spec- 
troscope did not show the F line distinctly. 4800 cells caused so much 
heat that the ring became red-hot and opened out and formed a sort of 
hook, as in 55, fig. 46. 
Tube 129, 3 rd Charge of Hydrogen. 
35. — Pressure 15 ’6 m.m., 20,526 M. At first the current of 4800 rod cells 
passed, giving a glow both at the positive and negative terminals ; subse- 
quently 5880 cells were necessary, and there shot across slowly from the 
positive the luminous entity 40, fig. 45. At first only 1 entity was formed, 
then 2, then 3, and lastly 4, the heat was great in their immediate vicinity ; 
they flowed from positive to negative, and when the hand was approached 
as if to grasp them they receded from it towards the positive. After a 
short time a few strata were formed in the luminosities, as in 104, fig. 46. 
Ultimately 8040 cells were necessary, and the current only passed when the 
point was negative. 
Tube 129, 4 th Charge of Hydrogen. 
36. — Air being suspected, the tube was again filled with hydrogen and gradually 
exhausted ; at 38 m.m., 50,000 M pressure, it was ascertained by means of 
the illumination of a tell-tale tube, No. 82, placed in the circuit, that a 
current of 8040 cells was passing when no illumination of the terminals of 
tube 129 could be seen, but possibly it may have passed on the outside of 
the tube. No. 82 has a resistance of only 16,000 ohms. Very soon after- 
wards, as the exhaustion was being continued by means of the water trompe, 
the terminals became illuminated. 
37. — Pressure 13’5 m.m., 17,763 M, 8040 cells. One luminosity like 43, 
fig. 45, darted from either ring (distorted now like a hook) or straight 
wire, if positive, when it had reached the centre of the tube it darted back 
again. Ultimately 1, then 2, then 3 luminosities were produced. Great 
heat was evolved in the neighbourhood of these luminosities. In the 
spectrum the hydrogen lines C and F were very visible and air lines absent. 
38. — Pressure 8'5 m.m., 11,184 M, 4800 cells. A glow about 4 inches long 
emanated from the positive, and then, intermittently, worm-like luminosities 
were formed as in experiment 12, but with this difference, that the worm-like 
entities were double one over the other nearly parallel to the axis of the tube. 
39. — Pressure 7 ‘ 8 m.m., 10,263 M. With 6960 cells, but better with 8040, 
2 A 2 
