Note 101 — Chapter IV · Sequel to the Epoch of Newton, continued.—Verification and Completion of the Newtonian Theory.
Reading edition
M. de Humboldt (Kosmos, p. 116) speaks of nine returns of Halley’s Comet, the comet observed in China in 1378 being identified with this. But whether we take 1378 or 1380 for the appearance in that century, if we begin with that, we have only seven appearances, namely, in 1378 or 1380, in 1456, in 1531, in 1607, in 1682, in 1759, and in 1835.