Opinions and conjectures, concerning the properties and effects
of the electrical matter, and the means of preserving buildings,
ships, &c. from lightning, arising from experiments and
observations made at Philadelphia, 1749.--Golden fish.--Extraction
of effluvial virtues by electricity impracticable. 217
Additional experiments: proving that the Leyden bottle has no more
electrical fire in it when charged, than before: nor less when
discharged: that in discharging, the fire does not issue from the
wire and the coating at the same time, as some have thought, but
that the coating always receives what is discharged by the wire,
or an equal quantity: the outer surface being always in a negative
state of electricity, when the inner surface is in a positive
state. 245
Accumulation of the electrical fire proved to be in the electrified
glass.--Effect of lightning on the needle of compasses,
explained.--Gunpowder fired by the electric flame. 247