The Borghesi Astronomical Clock in the Museum of History and Technology / Contributions from the Museum of History and Technology, Paper 35

by Silvio A. Bedini

D Roman indiction (Ind. Rom.), part of the reckoning of the Julian period;

E Solar cycle, (Cyc. Sol.), part of the reckoning for the Julian period;

F Golden number (Num. Aur.), part of the reckoning for the Julian period;

G, H, I, J The era, or the current year; part of the six windows of the Iris, or rainbow;

K Shuttered winding hole, for winding up the weights; part of the six windows of the Iris;

L The era, or the month of the current year; part of the Iris, or six windows of the rainbow;

M The sun in its epicycle;

N The 12 signs of the sun's anomaly;

O, P The first chapter ring representing the equatorial globe of the week, revolving from left to right;

Q The coming day indicated through the window;