The Complete Works in Philosophy, Politics and Morals of the late Dr. Benjamin Franklin, Vol. 2 [of 3]

By Benjamin Franklin

Page 87

forces equal? and since force and celerity in the same quantity
of matter are always in _proportion_ to each other, why should we,
when the quantity of matter is doubled, allow the force to continue
unimpaired, and yet suppose one half of the celerity to be lost?--I
wonder the more at our author's mistake in this point, since in the
same number I find him observing: "We may easily conceive that a body
as 3 _a_, 4 _a_, &c. would make 3 or 4 bodies equal to once _a_, each
of which would require once the first force to be moved with the
celerity _c_." If then in 3 _a_, each _a_ requires once the first
force _f_ to be moved with the celerity _c_, would not each move
with the force _f_ and celerity _c_; and consequently the whole be 3
_a_ moving with 3 _f_ and 3 _c?_ After so distinct an observation,
how could he miss of the consequence, and imagine that 1 _c_ and 3
_c_ were the same? Thus as our author's abatement of celerity in the
case of 2 _a_ moved by 1 _f_ is imaginary, so must be his additional
resistance.--And here again, I am at a loss to discover any effect of
the vis inertiæ.

In No. 6, he tells us, "that all this is likewise certain when taken
the contrary way, viz. _from motion to rest_; for the body _a_ moving
with a certain velocity, as _c_, requires a certain degree of force
or resistance to stop that motion, &c. &c." that is, in other words,
equal force is necessary to destroy force. It may be so. But how
does that discover a vis inertiæ? would not the effect be the same
_if there were no such thing_? A force 1 _f_ strikes a body 1 _a_,
and moves it with the celerity 1 _c_, i. e. with the force 1 _f_: It
requires, even according to our author, only an opposing 1 _f_ to
stop it. But ought it not (if there were a vis inertiæ) to have not
only the force 1 _f_, but an additional force equal to the force of
vis inertiæ, that _obstinate power by which a body endeavours with_
all its might _to continue in its present state, whether of motion
or rest_? I say, ought there not to be an opposing force equal to
the sum of these?--The truth however is, that there is no body, how
large soever, moving with any velocity, how great soever, but may be
stopped by any opposing force, how small soever,

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Text Comparison with The Complete Works in Philosophy, Politics and Morals of the late Dr. Benjamin Franklin, Vol. 2 [of 3]

Page 3
--Effect of the sun's rays on cloth of different colours 105 On the vis inertiæ of matter 110 On the different strata of the earth .
Page 32
By one account, in the _Transactions_, of a spout that fell at Colne in Lancashire, one would think the column is sometimes lifted off from the water, and carried over land, and there let fall in a body; but this, I suppose, happens rarely.
Page 37
More or less of a cloud, as I am informed, always appears over the place first; then a spattering on the surface of the water below; and when this is advanced to a considerable degree, the spout emerges from the cloud, and descends, and that, if the causes are sufficient, down to the places of spattering, with a roaring in proportion to the quantity of the discharge; then it abates, or stops, sometimes more gradually, sometimes more suddenly.
Page 51
It appeared in the form of a sugar-loaf, spinning on its point, moving up the hill towards us, and enlarging as it came forward.
Page 80
I have often observed myself, that however thirsty I may have been before going into the water to swim, I am never long so in the water.
Page 85
--Our author himself seems to allow this towards the end of the same No.
Page 126
One maritime observation more shall finish this letter.
Page 162
|N E |SW bS | 131 |20 0 | | | 6 |41 3 |19 44| 70| 68 | 71| 69 |N E |SW ½S | 166 |16 30 | | | 7 |38 45 |21 34| 70| 70 | 68| 70 |N E |SSW ¾W| 165 |11 30 | | | 8 |36 42 |23 10| 72| 71 | 73| 72 |N E |SSW ¾W| 149 |11 15 | | | 9 |35 40 |25 40| 73| 73 | 73| 74 |N E |WSW ¼S| 137 | --|--------| | 10 |35 0 |27 0| 71| 73 | 77| 75 |N W |WSW ¾S| 76 | |Therm|Noon| | 11 |33 51 |28 42| 74| 74 | 76| 77 |North|SW ¾W | 112 | |-----|----| | 12 |33 30 |31 30| 76| 75 | 76| 76 |North|W ¾S | 143 | | A.
Page 175
Those four were all that our doctors allow to have died of the small-pox by inoculation, though I think there were two more of the inoculated who died of the distemper; but the eruptions appearing soon after the operation, it is supposed they had taken the infection before, in the common way.
Page 201
Was a man, even in a sweat, to leap into a cold bath, or jump from his warm bed, in the intensest cold, even in a frost, provided he do not continue over-long therein, and be in health when he does this, we see by experience that he gets no harm.
Page 208
Various have been the contrivances to avoid this, such as bringing in fresh air through pipes in the jams of the chimney, which, pointing upwards, should blow the smoke up the funnel; opening passages into the funnel above, to let in air for the same purpose.
Page 221
The air entering this breach freely, destroyed the drawing force of the funnel.
Page 223
Much more of the prosperity of a winter country depends on the plenty and cheapness of fuel, than is generally imagined.
Page 269
4.
Page 284
ƕi tru kuestԻųn ƕen, is nϖt hueƕhųr ƕaer uil bi no difikųltiz ϖr inkϖnviniensiz, bųt hueƕer ƕi difikųltiz mê nϖt bi sųrmϖunted; and hueƕeųr ƕi kϖnviniensiz uil nϖt, ϖn ƕi huol, bi gretųr ƕan ƕi inkϖnviniensiz.
Page 317
By your news-papers we are told, that God had sent a very short harvest to some other countries of Europe.
Page 334
Our author himself would hardly approve entirely of this Turk's conduct in the government of slaves; and yet he appears to recommend something like it for the government of English subjects, when he applauds the reply of judge Burnet to the convict horse-stealer; who, being asked what he had to say why judgment of death should not pass against him, and answering, that it was hard to hang a man for _only_ stealing a horse, was told by the judge, "Man, thou art not to be hanged _only_ for stealing a horse, but that horses may not be.
Page 335
_" It is said by those who know Europe generally, that there are more thefts committed and punished annually in England, than in all the other nations put together.
Page 379
50, 53 _Oversetting_ at sea, how it occurs, ii.
Page 386
178.