INVENTORS - CC & Public Domain | Flickr

Alexander Graham Bell at the opening of the long-distance line from New York to Chicago (LOC) by The Library of Congress

8

Identified! [Charles Greeley Abbot, astrophysicist and Secretary of the Smithsonian, with his device: a silver-disc pyrheliometer which measures direct beam solar irradiance] (LOC) by The Library of Congress

66 11

Alexander Graham Bell by City of Boston Archives

3

Nothing here yet.

You can save a photo or video to a gallery from its detail page, or choose from your faves here.

Comments