August 15

M Waldo Hanchett patented a dental chair on this day in 1848.

Did you know that:

• The first freight delivery tunnel system began underneath Chicago on this day in 1906
• India gained independence on this day in 1947
• Ben Affleck is an American actor, film director, producer, and screenwriter born on this day in 1972

// Compiled by Zoya Siddiqui