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 their places.
David Rittenhouse, an American astronomer and mathematician, describes the design of an orrery, a mechanical model of the solar system, emphasizing the importance of scale and adjustability.
Rittenhouse's quote highlights the significance of proportion and versatility in the construction of an orrery, allowing for the representation of different celestial bodies and their relative sizes.
In the 18th century, orreries were popular scientific instruments used to educate people about the solar system and its workings, often featuring intricate mechanisms and artistic designs.
David Rittenhouse was a renowned American astronomer, mathematician, and inventor who made significant contributions to the fields of astronomy, mathematics, and science education.
Rittenhouse's design for an orrery showcases the importance of precision and adjustability in scientific instruments, allowing for a deeper understanding of celestial mechanics and the solar system.