"
"Do the conductors not prevent the lightning from doing harm?"
"Yes, but you cannot carry one of them on your hat. These rods are
only useful in protecting buildings, and then to nothing more than
double the area of their length; it is for this last reason that roofs
of public buildings have them projecting in all directions."
"They are a sort of trap set for the lightning, are they not?"
"Yes, and into which it is pretty sure to fall. Franklin, of whom I
spoke just now, was the first to suggest that bars of steel would draw
lightning out of a cloud surcharged with electricity."
"What becomes of it when it is caught?"
"Keeping in view its partiality for bell-pulls, a wire is attached to
the rod down which the unconscious fluid glides."
"Like a powder-monkey from the main-top."
"Exactly; till it enters a well, and there it is left at the bottom in
company with Truth."
A practical storm had begun to mix itself up with the theory as
developed by Jack, but not before they had very nearly reached their
destination, where they were waited for with the greatest anxiety.
No sooner had they landed than Sophia ran to meet Willis, who was
advancing with Jack.
"Ah, sweetheart," she said, "Susan has been so uneasy about you."
"You are a good girl, Miss Soph--Susan."
"Oh, if you only knew how frightened we have been!"
"What, do you admit fear to be one of your accomplishments, Miss
Sophia?" inquired Jack.
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