to Delaware or Schuylkill, and down one of them to their meeting,
and up the other and the other brook; the time of its doing this
may possibly be observable, and the further upwards the brooks are
chosen, the more observable it would be.
Should this be not observable, then suppose the two brooks falling
into Sasquehana and Delaware, and proceeding as before, the electric
fire may, by that means, make a circuit round the North Cape of
Virginia, and go many hundreds of miles, and in doing that, it would
seem it must take some observable time.
If still no observable time is found in that experiment, then
suppose the brooks falling the one into the Ohio, and the other into
Sasquehana, or Potomack, in that the electric fire would have a
circuit of some thousands of miles to go down Ohio to Mississippi,
to the Bay of Mexico, round Florida, and round the South Cape of
Virginia; which, I think, would give some observable time, and
discover exactly the velocity.
But if the electric fire dissipates, or weakens in the water, as I
fear it does, these experiments will not answer.
_Answer to the foregoing_.
Read at the Royal Society, Dec. 25, 1756.
Suppose a tube of any length open at both ends, and containing a
moveable wire of just the same length, that fills its bore. If I
attempt to introduce the end of another wire into the same tube, it
must be done by pushing forward the wire it already contains; and the
instant I press and move one end of that wire, the other end is also
moved; and in introducing one inch of the same wire, I extrude, at
the same time, an inch of the first, from the other end of the tube.
If the tube be filled with water, and I inject an additional inch of
water at one end, I force out an equal quantity at the other, in the
very same instant.
And the water forced out at one end of the tube is not the very same
water that was forced in at the other end at the same time, it was
only in motion at the same time.
The long wire, made use of in the experiment to discover the velocity
of the electric fluid, is itself filled with what we call its natural
quantity of that fluid, before the hook of the Leyden bottle is
applied to one end of it.
The outside of the bottle being at the time of such application
in contact with the other end of the
Then I took an opportunity of letting them see my watch; and lastly (my brother still grum and sullen) I gave them a piece of eight to drink, and took my leave.Page 34
Accordingly, he gave me an order.Page 52
Thus I spent about eighteen months in London; most part of the time I worked hard at my business, and spent but little upon myself except in seeing plays and in books.Page 57
The New Jersey job was obtained, I contrived a copperplate press for it, the first that had been seen in the country; I cut several ornaments and checks for the bills.Page 63
Their example was followed by many, and our number went on growing continually.Page 67
However, as he kept the post office, it was imagined he had better opportunities of obtaining news.Page 68
The answer to this, after some days, was that they did not approve the match; that, on inquiry of Bradford, they had been informed the printing business was not a profitable one; the types would soon be worn out and more wanted; that S.Page 72
Being called one morning to breakfast, I found it in a china.Page 75
Franklin died Dec.Page 84
I had not been early accustomed to it, and, having an exceeding good memory, I was not so sensible of the inconvenience attending want of method.Page 89
"That he governs the world by his providence.Page 103
Imagining then a semicircle, of which my distance should be the radius, and that it were filled with auditors, to each of whom I allowed two square feet, I computed that he might well be heard by more than thirty thousand.Page 107
We eight punctually attended the meeting; but though we thought that some of the Quakers would join us, we were by no means sure of a majority.Page 111
This pamphlet had a good effect.Page 119
It was by a private person, the late Mr.Page 136
his profession, and said no more.Page 149
de Lor, who had an apparatus for experimental philosophy, and lectured in that branch of science, undertook to repeat what he called the "Philadelphia experiments," and, after they were performed before the king and court, all the curious of Paris flocked to see them.Page 153
He set out for New York before me; and, as the time for dispatching the packet boats was at his disposition, and there were two then remaining there, one of which, he said, was to sail very soon, I requested to know the precise time, that I might not miss her by any delay of mine.Page 168
But a man's own care is profitable; for, If you would have a faithful servant and one that you like, serve yourself.Page 176
Emerson says that the chief use of a book is to inspire.