Description: On January 24, 1925, for the first time in over a century, a total solar eclipse would be visible across the northern part of the United States. How scientists used a dirigible to observe the phenomenon.
Description: People use postcards to correspond with each other, but the way they have used postcards to communicate has changed over time. The postcards in this gallery show how postcards began as a quick way to send short communications between individuals, but have since evolved to be used for longer communications and for requests between academics. While the typical use for a postcard