For the greater beauty of the instrument, the balls representing the planets are to be of considerable bigness; but so contrived, that they may be taken off at pleasure, and others, much smaller, and fitter for some purposes, put in… — David Rittenhouse Copy Share Image
For the greater beauty of the instrument, the balls representing the planets are to be of considerable bigness; but so contrived, that they may… — David Rittenhouse Copy Share Image
In order to know the true situation of a Planet at any particular time, the small set of balls are to be put each… — David Rittenhouse Copy Share Image
But Dr. Smith says, and I believe it to be a true state of the case, that he himself gave a course of Lectures… — David Rittenhouse Copy Share Image
