Silvio A. Bedini

The Pope's elephant

The Trail of Time

The life of Benjamin Banneker

Christopher Columbus and the age of exploration

The mace and the gavel

At the sign of the compass and quadrant

Early American Scientific Instruments and Their Makers [Museum of History and Technology]

With Compass and Chain

Jefferson Stone

Christopher Columbus Encyclopedia

Early Americans Scientific Instruments and Their Makers

Thinkers and tinkers

Mechanical universe

The Borghesi astronomical clock in the Museum of History and Technology

Scent of Time. a Study of the Use of Fire and Incense for Time Measurement in Oriental Countries

Der Elefant des Papstes