ELECTRIC DISCHARGE WITH THE CHLORIDE OE SILVER BATTERY. 219 
Tube No. 8, 14 inches long, diameter 1*5 inch. 
226. — This tube was placed in a metallic trough, 15 inches long, 4 ‘5 inches deep, 
and the same wide ; the trough was insulated on four paraffin cylinders 
p p, and filled with water, and also with a solution of common salt. The 
resistance of the tube was 60,000 ohms, 1200 cells would pass, but 2400 
were used with a resistance of 200,000 ohms, giving eight strata, 
C. 0'00259 W. On connecting one pole of the battery, and one terminal of 
the tube to earth, and the other pole to the other terminal of the tube, it 
was found that the difference of potential between the two terminals of the 
tube was the same, 1131 volts, whether the tube was in air, water, or a 
solution of common salt, and whether the trough was insulated or connected 
to earth. 
The experiment was repeated, but with the addition of the employment 
of a second battery A' Z' of 3240 cells, which was used to charge up the 
trough alternately + or — whilst the current of a battery of 1460 cells passed 
continuously through the tube. At each reversal of the charge of the 
liquid in the trough, a flash of light passed through the whole length of the 
tube, and the strata made a slight movement towards the negative terminal 
and back again to their original position. It was thought that the discharge, 
under the influence of induction, might take a hollow cylindrical form, but 
this did not occur. 
Tube 160, Hydrogen. 
227. — This tube was constructed with the object of sending the analogue of a 
smoke ring through a tube in which a steady stratification had been procured 
and sustained : fig. 65 shows the arrangement. 
Eig. 65. 
The tube is 40 inches iong and 1*875 inch in diameter, and has a stop cock 
2 p 2 
