98 
MESSRS. W. DE LA RUE AND H. W. MULLER ON THE 
we merely recall what has been stated by Dr. Bleekrode, that fluids such as bisulphide 
of carbon (CS 2 ), benzine (C 6 H 6 ), tin tetrachloride (SnCl 4 ), hydrochloric acid (HC1), 
cyanogen (C 2 N 2 ), zinc ethyl (Zn (C 2 H 5 )2), are all strongly agitated when the current 
passes, but there is no electrolytic decomposition. The fluid is repelled by the negative 
and attracted by the positive pole, as shown in fig. 24, giving proof of a molecular 
motion taking place during the passage of the current, this has been found to occur 
even when the current passes slowly from one plate of a condenser to the other. We 
cannot, however, refrain from observing in reference of Dr. Bleekrode’s experiments, 
that it is most remarkable that fused chloride of lithium (LiCl) is readily decomposed 
by four Bunsen cells, and fluid hydrochloric acid (HC1) resists a potential of 5640 cells; 
the accepted notions of electrolysis evidently requiring reconsideration. 
Battery in combination with an Accumulator ( condenser ). 
For several experiments we employ the accumulated charge of a condenser, and have 
condensers of different constructions and capacities, thus : — 
1st. Two globes, covered with tinfoil and then with india-rubber, to prevent the 
dispersion of the charge ; the axis is supported on ebonite uprights attached 
to a wooden base. The globes are 18 inches (45’72 centim.) in diameter, 
and present each a superficies of 7 ’07 square feet (6 5 ’68 square decim.) ; the 
capacity of each == 0 ’00037 microfarad. 
2nd. Two cylinders, made of many folds of paper, covered with tinfoil and then 
with several other layers of paper ; they are supported on three ebonite feet. 
Each cylinder has a superficies of 16 square feet (148 ’64 square decim.); 
these have each a capacity of 0 ’000 52 microfarad,. 
3rd. Coil condensers, composed of two insulated copper wires coiled together side 
by side on a reel, shown ip the diagram (fig. 25) :■ — 
Coil A consists of two wires, 174 yards (159 metres) long, and A, of an inch 
(O’ 16 centjm.) diameter ; these wires are covered with gutta-percha in 
two layers, being together -^ 2 -nd of an inch (0’08 centim.) thick ; this 
has a capacity of 0’014 m.f. 
B. A similar coil, 350 yards (320 metres) long, with a capacity of 0’031 m.f. 
C. A coil of the same thickness and length of wire, 350 yards, covered with 
india-rubber and linen, 3 - 2 -nds of an inch (0'24 centim.) thick = 0’028 m.f. 
This coil supports a charge of 3600 cells, A and B only 2400. 
