Personally appeared before us, John Kearsley and Cato Moore, Justices of the Peace for the county aforesaid, the sundry subscribers to the above certificate, who are all gentlemen of reputation, and by us supposed to be competent Judges of what they have set forth, and they acknowledge the same to be their voluntary act, we were likewise present at the exhibition, and certify the truth of the above certificate. Given under our hands this 13th of December, 1787.

John Kearsley, Cato Moore.

Berkeley County, Virginia, ss, J^o. 4.)

Being requested to attend an experiment made by M"" James RuMSEY with his Steam Boat, on Potowmack river, on Tuesday the 11th day of Dec. 1787, it was with great pleasure we saw her advance against the current, with about three tons on board, at the rate of four miles an hour, without an oar, or any thing but the force of steam, either 'to generate or assist the motion ; if the machinery had been in good order, we have reason to believe, she

NAVIGATION,

would have gone much faster, and as the machine is light and cheap, we are well persuaded that it may be of great advantage in navigation.

Moses Hogf, John Mark, John Morrow,

Cornel Wynkoop, Benoni Swearingen, Jos > Swearingen. N. B. We think the machinery does not weigh more than six or seven hundred weight, and is not included in the burthen mentioned above.

Berkeley County^ Virginia^ ss.

Personally appeared before us, two of the Justices of the Peace for the county aforesaid, the sundry subscribers to the above certificate, who are all gentlemen of reputation, and by us supposed to be competent judges of what they have set forth j and they have acknowledge the same to be their voluntary act. December the 13th, 1787.