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.
One of my great-great-grandfathers, named Michael Maloney. He emigrated from Ireland to Minnesota, where he was drafted into the Union Army in 1864. His regiment served mainly in Georgia. He survived the war and died at age 54 in 1884. I don't know precisely where this photo was taken. View full size.