Experiments and Observations on Electricity Made at Philadelphia in America

By Benjamin Franklin

Page 43

the bottle, though the same in
quantity, cannot be the very same fire that entered at the wire; for if it
were, the bottle would remain uncharged.

30. If the fire that so leaves the bottle be not the same that is thrown in
through the wire, it must be fire that subsisted in the bottle, (that is,
in the glass of the bottle) before the operation began.

31. If so, there must be a great quantity in glass, because a great
quantity is thus discharged even from very thin glass.

32. That this electrical fluid or fire is strongly attracted by glass, we
know from the quickness and violence with which it is resumed by the part
that had been deprived of it, when there is an opportunity. And by this,
that we cannot from a mass of glass draw a quantity of electrical fire, or
electrify the whole mass _minus_, as we can a mass of metal. We cannot
lessen or increase its whole quantity, for the quantity it has it holds;
and it has as much as it can hold. Its pores are filled with it as full as
the mutual repellency of the particles will admit; and what is already in,
refuses, or strongly repels, any additional quantity. Nor have we any way
of moving the electrical fluid in glass, but one; that is, by covering part
of the two surfaces of thin glass with non-electrics, and then throwing an
additional quantity of this fluid on one surface, which spreading in the
non-electric, and being bound by it to that surface, acts by its repelling
force on the particles of the electrical fluid contained in the other
surface, and drives them out of the glass into the non-electric on that
side, from whence they are discharged, and then those added on the charged
side can enter. But when this is done, there is no more in the glass, nor
less than before, just as much having left it on one side as it received on
the other.



[Illustration]

33. I feel a want of terms here, and doubt much whether I shall be able to
make this part intelligible. By the word _surface_, in this case, I do not
mean mere length and breadth without thickness; but when I speak of the
upper or under surface of a piece of glass, the outer or inner surface of
the vial, I mean length, breadth, and half the thickness, and beg the
favour of being so understood. Now, I suppose, that glass in its first
principles, and in the Furnace, has no

Last Page Next Page

Text Comparison with Franklin's Autobiography (Eclectic English Classics)

Page 11
Accordingly, I was employed in cutting wick for the candles, filling the dipping mold and the molds for cast candles,[21] attending the shop, going of errands, etc.
Page 13
My mother had likewise an excellent constitution.
Page 16
Three or four letters of a side had passed, when my father happened to find my papers and read them.
Page 27
She invited me to lodge at her house till a passage by water should offer; and, being tired with my foot traveling, I accepted the invitation.
Page 29
We were then near the sign of the Three Mariners.
Page 61
Thomas Godfrey, a self-taught mathematician, great in his way, and afterward inventor of what is now called Hadley's Quadrant.
Page 63
newspaper, and might then have work for him.
Page 66
[101] I soon after obtained, through my friend Hamilton, the printing of the Newcastle paper money, another profitable job, as I then thought it, small things appearing great to those in small circumstances; and these, to me, were really great advantages, as they were great encouragements.
Page 69
None of the inconveniences happened that we had apprehended; she proved a good and faithful helpmate, assisted me much by attending shop, we throve together, and have ever mutually endeavored to make each other happy.
Page 74
Attending duly the public worship.
Page 94
[n] We are told that it is proper to begin first with the Latin, and, having acquired that, it will be more easy to attain those modern languages which are derived from it; and yet we do not begin with the Greek in order more easily to acquire the Latin.
Page 97
201.
Page 109
Syng, one of our members: "If we fail, let us move the purchase of a fire engine with the money; the Quakers can have no objection to that; and then, if you nominate me and I you as a committee for that purpose, we will buy a great gun, which is certainly a fire engine,"--"I see," says he, "you have improved by being so long in the Assembly; your equivocal project would be just a match for their 'wheat or other grain.
Page 125
" "My dear friend," says he, pleasantly, "how can you advise my avoiding disputes? You know I love disputing; it is one of my greatest pleasures.
Page 138
He promised me that, if the masters would come to him at Trenton, where he should be in a few days on his march to New York, he would there deliver their men to them.
Page 146
I forget now the advice I gave; but I think it was that Dunbar should be written to, and prevailed with, if possible, to post his troops on the frontiers for their protection, till, by reenforcements from the colonies, he might be able to proceed on the expedition.
Page 148
Mr.
Page 157
The captain said she had once gone at the rate of thirteen knots, which is accounted thirteen miles per hour.
Page 165
many of them put together, who has so much in his power as thyself to promote a greater spirit of industry and early attention to business, frugality, and temperance with the American youth.
Page 173
The worst wheel of the cart makes the most noise.