Sir,--As it is desirable we should receive from our Consuls an exact report of all our vessels with their cargoes which go to the countries of their residence, such fees appear necessary as may induce them to be watchful that every such vessel is noted. At the same time, the fee should not be so large as to induce them to connive at foreign vessels reporting themselves as American, merely to give them the fee; five and ten dollars appear to me well proportioned. While I was in Europe I found there was a great want of some legal mode of taking and authenticating instruments and evidence in general, to be sent to this country; such as depositions, affidavits, copies of wills, records, deeds, powers of attorney, &c. I thought it would be proper, as soon as we should have Consuls established, to make their authentications under the seal of their office, good evidence in our courts. I take the liberty of submitting to you whether a clause for these purposes might not be properly placed in this bill. I assure you the occasions for it are extremely frequent. I have the honor to be, with great esteem, Sir, your most obedient humble servant. TO DAVID RITTENHOUSE. New York, June 30, 1790. Dear Sir,--Your favor of the 25th came to hand last night, for which I give you many thanks. The conversion of 36.71428 pouces into 39.1923 inches, was an error in division, and consequently the mean taken between that and Graham's computation is wrong. It has rendered it necessary for me to suppress the note on that subject, and to put it into the form now enclosed. In this I state the reason for adopting 11-3 pouces as the equivalent of the English foot. It is so stated by D'Alembert in the Encyclopedie, and retained in the new Encyclopedie. To have changed it for 11-3.11 Mashelynci's measure, would have obliged me to have formed all my calculations anew, which would have exposed me to new errors of calculation; and added to the trouble and delay it would have occasioned, did not seem worth while for so small a fraction as 11-100 of a line, or the 1227th of a foot. I suppose, too, that the operation concerting between the French and English will soon furnish us with a new and more certain equation of their feet. I still like the rod rather than the pendulum, because I do not know a single objection to it which does not lie to the pendulum, because it is clear of some objections to which that is liable, but most of all, because 1-5 of the second rod is much nearer the present foot than 1-3 of the second pendulum. After all, should the French and English adopt the pendulum, we shall be free to do so also. I state on the enclosed paper a very loose answer to the 5th objection, which is the only one I can give. Can you suggest something more precise? As there is an idea that Congress will rise about the middle of July, I shall only await the answer you will be so good as to make to this, and then give in my report.