ELECTRIC DISCHARGE WITH THE CHLORIDE OF SILVER BATTERY. 195 
141. — Another calibrated charge of hydrogen was let in and raised the pressure 
to 2'622 m.m., 3550 M ; the current of 3600 cells just passed : with 4800 cells 
a phase was produced resembling tube 129, fig. 7, Plate 15. 
142. — Another calibrated charge of hydrogen increased the pressure to 3'933 m.m., 
5175 M; 4800 rod cells just passed, but it required 5880 cells to produce 
a steady phase ; there were luminosities produced arranged in an irregular 
spiral, resembling 13, fig. 50. 
143. — The pump was worked and the pressure reduced to 2'548 m.m., 3343 M, 
3600 rod cells, C. 0'02209 W. Strata were produced as in 19, fig. 50, with 
a distinct spiral formation after the first five strata near the negative. These 
five strata at last assumed a direction in a curved line, and took up a rapid 
spiral rotation at first from the bottom towards the top of the tube, and 
afterwards in the opposite direction. 
144. — Pressure 0'7836 m.m., 1031 M ; 1200 cells would not pass ; 2400 did ; but 
the best effects were obtained with 4800 rod cells, which gave a current of 
0'03251 W, producing 17 beautiful and very blue strata, shown in fig. 6, 
Plate 16, copied from a photograph. In the spectroscope the double line 
near b was seen as well as C and F. 
145. — Pressure 0'7626 m.m., 964 M, 3600 cells, C. 0‘02544 W. A phase of 
tongue-shaped strata, as shown in fig. 7, Plate 16, which is copied from a 
photograph obtained in 8 seconds. 
146. — Two calibrated charges let into the tube raised the pressure to 1‘033 m.m., 
1359 M ; 3600 cells, C. 0'02825 W. 22 strata, in shape like those of 21, 
fig. 50. 
147. — More charges of hydrogen were let in and the pump worked to bring the 
tube to a good phase, it was then detached from the pump, January 29, 1877, 
and on March 11, 1878, it had not altered, giving with 3600 cells, C. 
0 '03368 W, 24 beautifully blue strata, and with 300,000 ohms resistance 
inserted, C. 0'00782 W, 18 pink strata. 
Tube 140, 29 inches between the terminals, Hydrogen . 
148. — Pressure 2’402 m.m., 3160 M, 5880 cells. A phase like fig. 51, but the 
strata more agitated towards the positive. 
Fig. 51. 
, m TUBE §40. 
149. — Pressure 1'721 m.m., 2264 M, 3600 cells, C. 0'10050 W, A phase as in 
fig. 51. The G, F, and C lines seen in the spectroscope. 
2 c 2 
