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

By Benjamin Franklin

Page 200

the false back being
plaistered and white-washed, and the hearth reddened, the whole will
make a pretty appearance. Before the black lead is laid on, it would
not be amiss to wash the plates with strong lee and a brush, or soap
and water, to cleanse them from any spots of grease or filth that may
be on them. If any grease should afterwards come on them, a little
wet ashes will get it out.

If it be well set up, and in a tolerable good chimney, smoke will
draw in from as far as the fore part of the bottom plate, as you may
try by a bit of burning paper.

People are at first apt to make their rooms too warm, not imagining
how little a fire will be sufficient. When the plates are no hotter
than that one may just bear the hand on them, the room will generally
be as warm as you desire it.


_Soon after the foregoing piece was published, some persons in
England, in imitation of Mr. Franklin's invention, made what they
call_ Pensylvanian Fire-places, with improvements; _the principal of
which pretended improvements is, a contraction of the passages in the
air-box, originally designed for admitting a quantity of fresh air,
and warming it as it entered the room. The contracting these passages
gains indeed more room for the grate, but in a great measure defeats
their intention. For if the passages in the air-box do not greatly
exceed in dimensions the amount of all the crevices by which cold air
can enter the room, they will not considerably prevent, as they were
intended to do, the entry of cold air through these crevices._

FOOTNOTES:

[44] Body or matter of any sort, is said to be _specifically_ heavier
or lighter than other matter, when it has more or less substance or
weight in the same dimensions.

[45] As the writer is neither physician nor philosopher, the reader
may expect he should justify these his opinions by the authority of
some that are so. M. Clare, F. R. S. in his treatise of _The Motion
of Fluids_, says, page 246, &c. "And here it may be remarked, that
it is more prejudicial to health to sit near a window or door, in
a room where there are many candles and a fire, than in a room
without; for the consumption of air thereby occasioned, will always
be very considerable, and this must necessarily be replaced by cold
air from without. Down the chimney can enter none, the stream of
warm air always arising therein absolutely forbids it, the supply
must therefore come in

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Text Comparison with Benjamin Franklin and the First Balloons

Page 0
M.
Page 1
It was brought early in the morning to the _Champ de Mars_, a Field in which Reviews are sometimes made, lying between the Military School and the River.
Page 2
There was some Wind, but not very strong.
Page 3
One has ordered four of 15 feet Diameter each; I know not with what Purpose; But such is the present Enthusiasm for promoting and improving this Discovery, that probably we shall soon make considerable Progress in the art of constructing and using the Machines.
Page 4
I was not present, but am told it was filled in about ten minutes by means of burning Straw.
Page 5
With great esteem and respect, for yourself and the Society; I have the honour to be, Sir, Your most obedient & most humble Servant, B.
Page 6
It was however much damaged.
Page 7
One of these courageous Philosophers, the Marquis d'Arlandes, did me the honour to call upon me in the Evening after the Experiment, with Mr.
Page 8
But the Emulation between the two Parties running high, the Improvement in the Construction and Management of the Balloons has already made a rapid Progress; and one cannot say how far it may go.
Page 9
BANKS, Bar^t.
Page 10
great Balloon was near, and a small one was discharg'd which went to an amazing Height, there being but little Wind to make it deviate from its perpendicular Course, and at length the Sight of it was lost.
Page 11
Ils y ont ete accueillis par Mrs.
Page 12
_ In the eighth line after the word "Balloon" Smyth inserts "lately.
Page 13
--Transcriber's note-- A caret (^) indicates the following character or characters were printed in superscript.
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17, "Sept.