ical fire which it contained; or,
if they could not effect this, they would at least conduct the electric
matter to the earth without any injury to the building.
"It was not till the summer of 1752 that he was enabled to complete his
grand and unparalleled discovery by experiment. The plan which he had
originally proposed was to erect, on some high tower or other elevated
place, a sentry-box, from which should rise a pointed iron rod,
insulated by being fixed in a cake of resin. Electrified clouds passing
over this would, he conceived, impart to it a portion of their
electricity, which would be rendered evident to the senses by sparks
being emitted when a key, the knuckle, or other conductor was presented
to it. Philadelphia at this time afforded no opportunity of trying an
experiment of this kind. While Franklin was waiting for the erection of
a spire, it occurred to him that he might have more ready access to the
region of clouds by means of a common kite. He prepared one by fastening
two cross sticks to a silken handkerchief, which would not suffer so
much from the rain as paper. To the upright stick was affixed an iron
point. The string was, as usual, of hemp, except the lower end, which
was silk. Where the hempen string terminated, a key was fastened. With
this apparatus, on the appearance of a thunder-gust approaching he went
out into the commons, accompanied by his son, to whom alone he
communicated his intentions, well knowing the ridicule which, too
generally for the interest of science, awaits unsuccessful experiments
in philosophy. He placed himself under a shed, to avoid the rain; his
kite was raised, a thunder-cloud passed over it, no sign of electricity
appeared. He almost despaired of success, when suddenly he observed the
loose fibres of his string to move toward an erect position. He now
presented his knuckle to the key and received a strong spark. How
exquisite must his sensations have been at this moment! On this
experiment depended the fate of his theory. If he succeeded, his name
would rank high among those who had improved science; if he failed, he
must inevitably be subjected to the derision of mankind, or, what is
worse, their pity, as a well-meaning man, but a weak, silly projector.
The anxiety with which he looked for the result of his experiment may be
easily conceived. Doubts and despair had begun to prevail, when the fact
was ascertained, in so clear a manner that even the most incredulous
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