Memoirs of Benjamin Franklin; Written by Himself. [Vol. 2 of 2] With his Most Interesting Essays, Letters, and Miscellaneous Writings; Familiar, Moral, Political, Economical, and Philosophical, Selected with Care from All His Published Productions, and Comprising Whatever Is Most Entertaining and Valuable to the General Reader

By Benjamin Franklin

Page 221

to the flesh, the parts are separated too far, and
pain ensues, as when they are separated by a pin or lancet. The
sensation that the separation by fire occasions we call heat or burning.
My desk on which I now write, and the lock of my desk, are both exposed
to the same temperature of the air, and have, therefore, the same degree
of heat or cold: yet if I lay my hand successively on the wood and on
the metal, the latter feels much the coldest; not that it is really so,
but, being a better conductor, it more readily than the wood takes away
and draws into itself the fire that was in my skin. Accordingly, if I
lay one hand part on the lock and part on the wood, and after it had
laid on some time, I feel both parts with my other hand, I find the part
that has been in contact with the lock very sensibly colder to the touch
than the part that lay on the wood. How a living animal obtains its
quantity of this fluid, called fire, is a curious question. I have shown
that some bodies (as metals) have a power of attracting it stronger than
others; and I have sometimes suspected that a living body had some power
of attracting out of the air, or other bodies, the heat it wanted. Thus
metals hammered, or repeatedly bent, grow hot in the bent or hammered
part. But when I consider that air, in contact with the body, cools it;
that the surrounding air is rather heated by its contact with the body;
that every breath of cooler air drawn in carries off part of the body's
heat when it passes out again; that, therefore, there must be in the
body a fund for producing it, or otherwise the animal would soon grow
cold; I have been rather inclined to think that the fluid _fire_, as
well as the fluid _air_, is attracted by plants in their growth, and
becomes consolidated with the other materials of which they are formed,
and makes a great part of their substance; that, when they come to be
digested, and to suffer in the vessels a kind of fermentation, part of
the fire, as well as part of the air, recovers its fluid, active state
again, and diffuses itself in the body, digesting and separating it;
that the fire, so reproduced by digestion and separation, continually
leaving the body, its place is supplied by fresh quantities, arising
from the continual separation; that whatever quickens the motion

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Text Comparison with Benjamin Franklin and the First Balloons

Page 0
, in December, 1905, and previously had belonged to G.
Page 1
[3] Histoire des Ballons, Paris, 1887, Volume I, page 29.
Page 2
It is said that for some Days after its being filled, the Ball was found to lose an eighth Part of its Force of Levity in 24 Hours; Whether this was from Imperfection in the Tightness of the Ball, or a Change in the Nature of the Air, Experiments may easily discover.
Page 3
Montgolfier, is to go up, as is said, from Versailles, in about 8 or 10 Days; It is not a Globe but of a different Form, more convenient for penetrating the Air.
Page 4
It lodged in.
Page 5
I say this in answer to your Question; for I did not indeed write them with a view of their being inserted.
Page 6
_ When they were as high as they chose to be, they made less Flame and suffered the Machine to drive Horizontally with the Wind, of which however they felt very little, as they went with it, and as fast.
Page 7
_Developpant du Gaz.
Page 8
A few Months since the Idea of Witches riding thro' the Air upon a Broomstick, and that of Philosophers upon a Bag of Smoke, would have appeared equally impossible and ridiculous.
Page 9
Charles & Robert's Experiment, which was to have been made at this Day, and at which I intended to be present.
Page 10
Means were used, I am told, to prevent the great Balloon's rising so high as might indanger its Bursting.
Page 11
2.
Page 12
22, since the ascension of d'Arlandes and de Rozier which, according to the letter, took place the previous day is known to have been on the 21st.
Page 13
S.
Page 14
2^d", for 2nd.