1 96 On increasing the charging Capacity 
Experiment XIII.— A second jar was taken of a 
larger size, being thirteen inches high, and its coating 
seven inches ; in the whole it contained about one hun- 
dred and ninety square inches : after being rubbed clean 
and dry, it was applied to the conductor of the machine : 
twelve turns of the plate produced a voluntary explosion 
to the outside coating. 
Experiment XIY. — A paper ring was put round the 
uncoated part on the outside at about an inch and a quar- 
ter distant from the coating : eleven turns of the plate pro- 
duced a voluntary explosion to the outside coating : the 
paper ring was then pushed down to the coating, after 
which no voluntary explosion to the coating could be ob- 
tained ; but it discharged itself to the electrometer ball 
standing at the distance of two inches and three-eighths 
from the knob oT tlie conductor. 
Experiment XV.— The same sort of wire, two inches 
long, as used in Experiment VI, was hung to the elec- 
trometer, and the discharge made it blue with several 
bendings,— a proof that it had been nearly red hot. 
Experiment XVI.— A ring of common writing paper 
©ne inch broad was pasted on the inside close to the coat- 
ing, and when dry no voluntary explosion to the coating 
could be obtained; but it discharged itself to the elec- 
trometer ball standing at the distance of two inches and 
five- eighths and the wire was fused into balls. 
Experiment XVII. — -The paper rings were now ta- 
ken off, and the uncoated part made clean and dry : nine- 
teen turns produced a discharge to the electrometer ball 
at the same distance, and the same length of wire was 
slightly blued. 
Experiment XVIII. — The jar was then breathed 
into, and a discharge was produced at the same distance^ 
but the wire was not fused. 
