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One woman watches as another examines with a magnifying glass an ornate, decorative image on a printed page

Mathematics and Primary Sources: In Search of the Perfect Calendar

Posted by: Danna Bell

One woman watches as another examines with a magnifying glass an ornate, decorative image on a printed page

Mathematics and Primary Sources: The Many Faces of Baseball

Posted by: Danna Bell

Picture of Ann Caracristi

Mathematics and Primary Sources: Historic Codes, Ciphers, and Computational Thinking, Part II – the Women Codebreakers of WWII

Posted by: Danna Bell

Cipher used by Lewis to communicate with Thomas Jefferson.

Mathematics and Primary Sources:  Historic Codes, Ciphers, and Computational Thinking, Part I

Posted by: Cheryl Lederle

One woman watches as another examines with a magnifying glass an ornate, decorative image on a printed page

Mathematics and Primary Sources: The Evolving Postal System

Posted by: Cheryl Lederle

One woman watches as another examines with a magnifying glass an ornate, decorative image on a printed page

Mathematics and Primary Sources: Measurement, History, and the English Language

Posted by: Danna Bell

One woman watches as another examines with a magnifying glass an ornate, decorative image on a printed page

This Week in Office Hours: The American Archives of Public Broadcasting and Math with Primary Sources

Posted by: Danna Bell

One woman watches as another examines with a magnifying glass an ornate, decorative image on a printed page

Catching Up with Library of Congress Blog Posts

Posted by: Danna Bell