ELECTRIC DISCHARGE WITH THE CHLORIDE OF SILVER BATTERY. 201 
Tube 128, 25 inches between the terminals, diameter 2 inches. 
A mixture of Sulphuretted-hydrogen and Hydrogen, the Pressure of the Gas 
being unknown .* 
177.— 3240 cells connected with the Vakley condenser of 42 '8 m.f., as in fig. 26, 
Part I. At the full tension of the battery tongue-shaped strata, as in tube 108, 
1, fig. 58 ; with 200,000 ohms resistance disc-shaped strata were obtained, 
as 1, fig. 55. When the battery was disconnected from the condenser, and its 
charge allowed to run down the strata became more distinct, and ultimately 
a thinner one introduced itself between those already existing, as 2, fig 55. 
It was also noticed that as the tension fell the strata at first moved 
towards the positive, then became stationary, and afterwards flowed back 
towards the negative. 
Fig. 
TUBE 128. 
SsJ 5 
55. 
TUBE !28. Z 
N 
178. — 3600 cells, C. 0 '01 272 W, produced the phase shown in fig. 1, Plate 18, 
there being a tendency to form tongue-shaped strata. The figure is copied 
from a photograph obtained in forty seconds. On the insertion of 500,000 
ohms resistance, C. 0 ’00432 W, the phase changed to that represented in 
fig. 2, Plate 18. 
179. — With 3240 cells connected with the condenser, as in fig. 26-, Part I., the 
potential of the condenser was measured with the electrometer ; when fully 
charged, tongue-shaped strata were produced ; when the potential had 
fallen to that of 2760 cells the phase shown in fig. 3, Plate 18, was 
obtained ; this is copied from a photograph obtained in 75 seconds. 
180. — Subsequently a change took place in the tube after standing for six months, 
when with 2400 rod cells beautiful double strata were produced, the current 
being 0 ’01 639 W. The strata were of a beautiful blue colour with a carmine 
line between them. A photograph was obtained, but has not been engraved, 
as it resembles closely fig. 3, Plate 16, except that the double strata only 
occupied one-half of the tube, the other half towards the negative being a 
dark discharge. 
* In those cases where the pressure is not stated, the tubes were filled and exhausted by the maker ; 
no information being furnished as to the pressure of the residual gas. 
MDCCCLXXVIII. 
