Experiments and Observations on Electricity Made at Philadelphia in America

By Benjamin Franklin

Page 53

their Tails and Atmospheres accounted for. Illustrated also by a
Copper-Plate. By G. Smith. Price 1s.


IV. The Natural History of Mount Vesuvius, with the Explanation of the
various Phenomena that usually attend the Eruptions of this celebrated
Volcano. Translated from the original Italian, composed by the Royal
Academy of Sciences at Naples, by Order of the King of the Two Sicilies.
Price 2s. stitch'd, or 2s. 6d. bound.



FOOTNOTES.

[1] We suppose every particle of sand, moisture, or smoke, being first
attracted and then repelled, carries off with it a portion of the
electrical fire; but that the same still subsists in those particles,
till they communicate it to something else; and that it is never
really destroyed.--So when water is thrown on common fire, we do not
imagine the element is thereby destroyed or annihilated, but only
dispersed, each particle of water carrying off in vapour its portion
of the fire, which it had attracted and attached to itself.

[2] Our tubes are made here of green glass, 27 or 30 inches long, as big
as can be grasped. Electricity is so much in vogue, that above one
hundred of them have been sold within these four months past.

[3] To charge a bottle commodiously through the coating, place it on a
glass stand; form a communication from the prime conductor to the
coating, and another from the hook to the wall or floor. When it is
charged, remove the latter communication before you take hold of the
bottle, otherwise great part of the fire will escape by it.

[4] The river that washes one side of _Philadelphia_, as the _Delaware_
does the other; both are ornamented with the summer habitations, of
the citizens, and the agreeable mansions of the principal people of
this colony.

[5] An electrified bumper, is a small thin glass tumbler, near filled with
wine, and electrified as the bottle. This when brought to the lips
gives a shock, if the party be close shaved, and does not breathe

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