Sir:—In obedience to the order of the House of Representatives of January 15th, I have now the honor to enclose you a report on the subject of measures, weights, and coins. The length of time which intervened between the date of the order and my arrival in this city, prevented my receiving it till the 15th of April; and an illness which followed soon after added, unavoidably, some weeks to the delay; so that it was not till about the 20th May that I was able to finish the report. A desire to lessen the number of its imperfections induced me still to withhold it awhile, till, on the 15th of June, came to my hands, from Paris, a printed copy of a proposition made by the Bishop of Autun, to the National Assembly of France, on the subject of weights and measures; and three days afterwards I received, through the channel of the public papers, the speech of Sir John Riggs Miller, of April 13th, in the British House of Commons, on the same subject. In the report which I had prepared, and was then about to give in, I had proposed the latitude of 38°, as that which should fix our standard, because it was the medium latitude of the United States; but the proposition before the National Assembly of France, to take that of 45° as being a middle term between the equator and both poles, and a term which consequently might unite the nations of both hemispheres, appeared to me so well chosen, and so just, that I did not hesitate a moment to prefer it to that of 38°. It became necessary, of course, to conform all my calculations to that standard—an operation which has been retarded by my other occupations.
These circumstances will, I hope, apologize for the delay which has attended the execution of the order of the House; and, perhaps, a disposition on their part to have due regard for the proceedings of other nations, engaged on the same subject, may induce them still to defer deciding ultimately on it till their next session. Should this be the case, and should any new matter occur in the meantime, I shall think it my duty to communicate it to the House, as supplemental to the present report.
I have the honor to be, with sentiments of the most profound respect,
Sir, your most obedient and most humble servant.
The Secretary of State, to whom was referred, by the House of Representatives, to prepare and report a proper plan or plans for establishing uniformity in the currency, weights, and measures of the United States, in obedience thereto, makes the following report:—
To obtain uniformity in measures, weights, and coins, it is necessary to find some measure of invariable length, with which, as a standard, they may be compared.
There exists not in nature, as far as has been hitherto observed, a single subject or species of subject, accessible to man, which presents one constant and uniform dimension.
The globe of the earth itself, indeed, might be considered as invariable in all its dimensions, and that its circumference would furnish an invariable measure; but no one of its circles, great or small, is accessible to admeasurement through all its parts, and the various trials to measure definite portions of them, have been of such various result as to show there is no dependence on that operation for certainty.
Matter, then, by its mere extension, furnishing nothing invariable, its motion is the only remaining resource.
The motion of the earth round its axis, though not absolutely uniform and invariable, may be considered as such for every human purpose. It is measured obviously, but unequally, by the departure of a given meridian from the sun, and its return to it, constituting a solar day. Throwing together the inequalities of solar days, a mean interval, or day, has been found, and divided, by very general consent, into 86,400 equal parts.