ELECTRIC DISCHARGE WITH THE CHLORIDE OF SILVER BATTERY. 511 
menon in one’s mind the current was at first sent through a fine platinum wire 
26 inches (66’04 centims.) long, and 0‘002 inch (0‘005 centim.) in diameter, leading 
wires from a Thomson galvanometer were connected inch (l - 27 centim.) apart with 
the middle of the wire, the deflection of the galvanometer to the right showed that 
the current was as anticipated in the same direction in this fraction as in the whole 
wire. 
7 5 - 5 volts 
The deflection through the wire was 162 divisions with g-tjpg shunt, —161,200 
without shunt, = 
1 megohm 
to the right. When a moistened thread was substituted 
for the fine wire the effect was the same. When, however, a vacuum tube was 
employed, then evidence was frequently obtained of a current in a contrary direction. 
With tube No. 365, 21f inches (55'25 centims.) long, with 3600 cells, a series of 
eleven pairs of beautiful double strata, like those in Plate 16, fig. 3, Part III., were 
obtained, fig. 29, 1; these were perfectly steady. Two idle wires, 9f inches (24‘8 
Fig. 29. 
centims.) and 10 inches (25’4 centims.) distant from the positive end and embracing 
the seventh pair of strata, were connected with the Thomson galvanometer,* when the 
following numbers were obtained :—- 
With x shunt. 
Without shunt. 
To left 
50- 
= 496 — 
To right 
56 + 
559 + 
To left 
50- 
= 496- 
30- 
= 298- 
? 5 
140- 
= 1.389- 
To right 143 + 
- 1419 + 
On introducing a resistance of 500,000 ohms in the current, a pink stratification of 
nineteen strata was obtained like that in Plate 16, fig. 4, Part IIP, fig. 30, 2. The 
* The constant of this galvanometer, with the controlling magnet in the position used in the following 
experiments, is C - ^ V0 ^ —=2136 divisions, or through 2136 ohms xl0 6 = l division. The multiplier 
1 megohm 
for the |th shunt = 9'92, that for the g-g-^th = 995’3. 
3 U 2 
