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AN ECONOMICAL PROJECT.
To the Authors of the Journal. 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 splendor; 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 subjects 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 almanack, 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 po 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 al. manack, 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 so it 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 vatural 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 own that he puzzled me a little, but he did not satisfy me; and the subsequent observations I made, as above-mentioned, coufirmed 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 100,000 families in
aris, 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 twentieth of March and the twentieth of September, there are Nights
183 Hours of each night in which we burn candles
Multiplication gives for the total
1,281 These 1,281 hours multiplied by
100,000, the number of inhabit-
128,100,000 One hundred twenty-eight millions
and one hundred thousand hours,
64,050,000 Sixty-four millions and fifty thou
sand of pounds, which, estima.
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 learned from this paper that it is day-light when the sun rises,
wiil 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 burcing 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 fa. mily 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 at 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 coute. Oblige a man to rise at four in the morning, and it is more than probable he shall go willingly to bed at eight in the evening; and having had eight hours' sleep, he will rise more willingly at four 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