Note 5 — Before 1800.
Reading edition
Mr. Needles says: "He was visited by William Hartshorn and Samuel Coates of this city (Philadelphia), and gave correct answers to all their questions—such as how many seconds there are in a year and a half. In two minutes he answered 47,304,000. How many seconds in seventy years, seventeen days, twelve hours. In one minute and a half, 2,110,500,800. He multiplied nine figures by nine," etc., etc.