Not a fan of gaining an hour in the fall and losing an hour in the spring?
Blame one of America's founding fathers: Ben Franklin.
Although originally presented with his trademark wit, Ben
Franklin gets credit for introducing the concept of daylight saving time.
At age 78, while serving as ambassador to Paris, Franklin
wrote a letter to the Journal of Paris of his "discovery" that the
sun gives light as soon as it rises, and teasing Parisians for staying up late
by candlelight. In this satirical piece he came up with the concept of Daylight
Savings Time. Others took daylight saving time much more seriously and now,
over 2 centuries later, the world uses his basic concept to better utilize the
benefits of sunlight and to conserve energy.
To THE AUTHORS of
The Journal of Paris
1784
MESSIEURS,
You often entertain us with accounts of new discoveries.
Permit me to communicate to the public, through your paper, one that has lately
been made by myself, and which I conceive may be of great utility.
I was the other evening in a grand company, where the new
lamp of Messrs. Quinquet and Lange was introduced, and much admired for its
splendour; but a general inquiry was made, whether the oil it consumed was not
in proportion to the light it afforded, in which case there would be no saving
in the use of it. No one present could satisfy us in that point, which all
agreed ought to be known, it being a very desirable thing to lessen, if
possible, the expense of lighting our apartments, when every other article of
family expense was so much augmented.
I was pleased to see this general concern for economy, for I
love economy exceedingly.
I went home, and to bed, three or four hours after midnight,
with my head full of the subject. An accidental sudden noise waked me about six
in the morning, when I was surprised to find my room filled with light; and I
imagined at first, that a number of those lamps had been brought into it; but,
rubbing my eyes, I perceived the light came in at the windows. I got up and
looked out to see what might be the occasion of it, when I saw the sun just
rising above the horizon, from whence he poured his rays plentifully into my
chamber, my domestic having negligently omitted, the preceding evening, to
close the shutters.
I looked at my watch, which goes very well, and found that
it was but six o'clock; and still thinking it something extraordinary that the
sun should rise so early, I looked into the almanac, where I found it to be the
hour given for his rising on that day. I looked forward, too, and found he was
to rise still earlier every day till towards the end of June; and that at no
time in the year he retarded his rising so long as till eight o'clock. Your
readers, who with me have never seen any signs of sunshine before noon, and
seldom regard the astronomical part of the almanac, will be as much astonished
as I was, when they hear of his rising so early; and especially when I assure
them, that he gives light as soon as he rises. I am convinced of this. I am
certain of my fact. One cannot be more certain of any fact. I saw it with my
own eyes. And, having repeated this observation the three following mornings, I
found always precisely the same result.
Yet it so happens, that when I speak of this discovery to
others, I can easily perceive by their countenances, though they forbear
expressing it in words, that they do not quite believe me. One, indeed, who is
a learned natural philosopher, has assured me that I must certainly be mistaken
as to the circumstance of the light coming into my room; for it being well
known, as he says, that there could be no light abroad at that hour, it follows
that none could enter from without; and that of consequence, my windows being
accidentally left open, instead of letting in the light, had only served to let
out the darkness; and he used many ingenious arguments to show me how I might,
by that means, have been deceived. I owned that he puzzled me a little, but he
did not satisfy me; and the subsequent observations I made, as above mentioned,
confirmed me in my first opinion.
This event has given rise in my mind to several serious and
important reflections. I considered that, if I had not been awakened so early
in the morning, I should have slept six hours longer by the light of the sun,
and in exchange have lived six hours the following night by candle-light; and,
the latter being a much more expensive light than the former, my love of
economy induced me to muster up what little arithmetic I was master of, and to
make some calculations, which I shall give you, after observing that utility is,
in my opinion the test of value in matters of invention, and that a discovery
which can be applied to no use, or is not good for something, is good for
nothing.
I took for the basis of my calculation the supposition that
there are one hundred thousand families in Paris, and that these families
consume in the night half a pound of bougies, or candles, per hour. I think
this is a moderate allowance, taking one family with another; for though I
believe some consume less, I know that many consume a great deal more. Then
estimating seven hours per day as the medium quantity between the time of the
sun's rising and ours, he rising during the six following months from six to
eight hours before noon, and there being seven hours of course per night in
which we burn candles, the account will stand thus;--
In the six months between the 20th of March and the 20th of
September, there are
|
Nights
|
183
|
|
Hours of each night in which we burn candles
|
7
|
|
Multiplication gives for the total number of hours
|
1,281
|
|
These 1,281 hours multiplied by 100,000, the number of
inhabitants, give
|
128,100,000
|
|
One hundred twenty-eight millions and one hundred thousand
hours, spent at Paris by candle-light, which, at half a pound of wax and
tallow per hour, gives the weight of
|
64,050,000
|
|
Sixty-four millions and fifty thousand of pounds, which,
estimating the whole at-the medium price of thirty sols the pound, makes the
sum of ninety-six millions and seventy-five thousand livres tournois
|
96,075,000
|
An immense sum! that the city of Paris might save every
year, by the economy of using sunshine instead of candles. If it should be
said, that people are apt to be obstinately attached to old customs, and that
it will be difficult to induce them to rise before noon, consequently my
discovery can be of little use; I answer, Nil desperandum. I believe all who
have common sense, as soon as they have learnt from this paper that it is
daylight when the sun rises, will contrive to rise with him; and, to compel the
rest, I would propose the following regulations; First. Let a tax be laid of a
louis per window, on every window that is provided with shutters to keep out
the light of the sun.
Second. Let the same salutary operation of police be made
use of, to prevent our burning candles, that inclined us last winter to be more
economical in burning wood; that is, let guards be placed in the shops of the
wax and tallow chandlers, and no family be permitted to be supplied with more
than one pound of candles per week.
Third. Let guards also be posted to stop all the coaches,
&c. that would pass the streets after sunset, except those of physicians,
surgeons, and midwives.
Fourth. Every morning, as soon as the sun rises, let all the
bells in every church be set ringing; and if that is not sufficient? let cannon
be fired in every street, to wake the sluggards effectually, and make them open
their eyes to see their true interest.
All the difficulty will be in the first two or three days;
after which the reformation will be as natural and easy as the present
irregularity; for, ce n'est que le premier pas qui coûte. Oblige a man to rise
at four in the morning, and it is more than probable he will go willingly to
bed at eight in the evening; and, having had eight hours sleep, he will rise
more willingly at four in the morning following. But this sum of ninety-six
millions and seventy-five thousand livres is not the whole of what may be saved
by my economical project. You may observe that I have calculated upon only one
half of the year, and much may be saved in the other, though the days are
shorter. Besides, the immense stock of wax and tallow left unconsumed during
the summer, will probably make candles much cheaper for the ensuing winter, and
continue them cheaper as long as the proposed reformation shall be supported.
For the great benefit of this discovery, thus freely
communicated and bestowed by me on the public, I demand neither place, pension,
exclusive privilege, nor any other reward whatever. I expect only to have the
honour of it. And yet I know there are little, envious minds, who will, as
usual, deny me this and say, that my invention was known to the ancients, and
perhaps they may bring passages out of the old books in proof of it. I will not
dispute with these people, that the ancients knew not the sun would rise at
certain hours; they possibly had, as we have, almanacs that predicted it; but
it does not follow thence, that they knew he gave light as soon as he rose. This
is what I claim as my discovery. If the ancients knew it, it might have been
long since forgotten; for it certainly was unknown to the moderns, at least to
the Parisians, which to prove, I need use but one plain simple argument. They
are as well instructed judicious, and prudent a people as exist anywhere in the
world all professing, like myself, to be lovers of economy; and, from the many
heavy taxes required from them by the necessities of the state, have surely an
abundant reason to be economical. I say it is impossible that so sensible a
people, under such circumstances, should have lived so long by the smoky,
unwholesome, and enormously expensive light of candles, if they had really
known, that they might have had as much pure light of the sun for nothing. I
am, &c.
A SUBSCRIBER
Source: Nathan G. Goodman - The Ingenious Dr. Franklin.
Selected Scientific Letters.
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