Mathematician:John Perry Ballantine

Mathematician
American mathematician best known for his work on improvements to classroom calculation techniques.

Inventor of the table slide rule.

Nationality
American (born overseas to missionary parents)

History

 * Born: 1896 in Rahuri, India
 * Died: 1970

Inventions

 * Table Slide Rule

Publications

 * 1938: Essentials of Engineering Mathematics
 * 1938: Essentials of Engineering Mathematics