Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
A friend is having me scan some of her family photos, and I fell in love with this Kodachrome slide; she gave me permission to post it to Shorpy. It's her sister and their great-grandfather on his farm in Sabattus, Maine, in 1964. View full size.