The Borghesi Astronomical Clock in the Museum of History and Technology

The Borghesi Astronomical Clock in the Museum of History and Technology is a work by Silvio A. Bedini. The text says the history of the great theoretical and mechanical achievement which the Borghesi clock represents has been most adequately covered elsewhere. The text says that consideration of the development of equation and astronomical clocks is required only for the purpose of relating the Borghesi timepiece with the other significant developments in this branch of horology. The text names the translation from Francesco Borghesi's Latin texts as what made the study possible.

The text says that, in spite of his ingenuity in designing a text which would include only such of the letters representing the Roman numerals which would provide the chronograms for 1764, Father Borghesi experienced some difficulties, particularly in place names. Examples given are MEGGL instead of MECHL, which had an extra C, and RVNNO instead of RVMO, which had an extra M. A speaker says he took care that the wheel which immediately communicates motion to the index of the synodic moon should be so fitted internally to the mechanism.