Description: There are several ways to date postcards that are seemingly undated. This page provides a few general methods for determining a time period or date for postcards.GENERAL POSTCARD CHRONOLOGY[edan-image:id=siris_sic_13846,size=250,left]Postcard producers printed cards that followed the current trends of postcards. Dates can be approximated by the material and design of a
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.