light – Citizen U Primary Source Nexus

Librarian of Congress Carla Hayden: Holiday Message & Read Aloud

December 18, 2020December 16, 2022

Before watching the video below, read the Minerva’s Kaleidoscope blog post, Sharing Kindness, Bringing Light as We Read Together, to get acquainted with the story of Bear and Coco and review some pre-reading discussion questions.

Drawing by Alexander Graham Bell and Charles Sumner Tainter, April 1880

Primary Source Picks

Today in History: Bell’s Photophone

June 3, 2014June 3, 2018

Today in History–June 3–the Library of Congress features the invention of the photophone on this date in 1880 by Alexander Graham Bell. Although more famously known for the telephone, the photophone transmitted sound on a beam of light. This technology with the precursor to fiber optics which today transmits voice and data communications at the speed of light….