Note (return) — Richmond Palace

Newton has computed that the sun's heat in the comet of 1680,2 was, to his heat with us at Midsummer, as twenty-eight thousand to one; and that the heat of the body of the comet was near two thousand times as great as that of red-hot iron. The same great author also calculates, that a globe of red-hot iron, of the dimensions of our earth, would scarce be cool in fifty thousand years. If then the comet be supposed to cool a hundred times as fast as red-hot iron, yet, since its heat was two thousand times greater, supposing it of the bigness of the earth, it would not be cool in a million of years.