Banneker lived a life of unusual
achievement. In 1753, the young man borrowed a pocket watch from a well-to-do
neighbor; he took it apart and made a drawing of each component, then reassembled the
watch and returned it, fully functioning to its owner. From his drawings Banneker
then proceeded to carve out of wood enlarged replicas of each part. Calculating the
proper number of teeth for each gear and the necessary relationships between the gears, he
constructed a working wooden clock that kept accurate time and struck the hours for over
At age 58, Banneker began the study of
astronomy and was soon predicting future solar and lunar eclipses. He composed the
ephemeris, or information table, for annual almanacs that were published for the years
1792 through 1797. "Benjamin
Banneker's Almanac" was a top seller from Pennsylvania to Kentucky. In
1791, Banneker was a technical assistant in the calculating and first-ever surveying of
the Federal District, which is now Washington, D.C. The "Sable Astronomer"
was often pointed to as proof that African Americans were not intellectually inferior to
European Americans. Thomas Jefferson himself noted this in a letter to Banneker.
Revised: July 18, 2013.