L V C C I D I V I D D I

50 5 100 100 1 500 1 5 1 500 500 1 = 1764.

The third inscription required a little more planning, because of its

greater length. Accordingly, Father Borghesi divided it into nine parts,

each of which is separated from the other by means of asterisks. Each of

the nine parts of the inscription formed a chronogram which, in every

instance, totals to the date 1764, the year in which the second clock

was completed. The same procedure was followed with the inscriptions in

the lower left and the lower right corners of the dial as well as with

the maker's inscription within the central disk. This inscription is

Smithsonian Institution - United States National Museum - Bulletin 240 Contributions From the Museum of History and Technology Papers 34-44 on Science and Technology · 第 60 / 318 题