Celebrating 100 Years of Women's Suffrage
(Library of Congress, Prints & Photographs Division, Harris & Ewing Collection)
Two suffragettes watch as Pennsylvania Republican Gov. William Cameron Sproul signs the 19th Amendment, which guaranteed women in America the right to vote. The measure was approved by both houses of Congress in 1919. Pennsylvania was the seventh state to ratify it. In August 1920, Tennessee became the 36th state to ratify, thereby causing the change to the constitution to kick in just in time for that year's presidential election.