“ Newton supposed that the case of the planet was similar to that of [a ball spun around on the end of an elastic string]; that it was always pulled in the direction of the sun, and that this attraction… — William Kingdon Clifford Copy Share Image
Newton supposed that all matter attracted other matter inversely according to the square of the distance; and the hypothesis was found to account for the whole movements of the heavenly bodies; which all became verifications of what Newton supposed to… — James McCosh Copy Share Image