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.
Untitled circa 1916. It was love at first sight. (The girl looks strangely familiar. Have we seen her before?) Harris & Ewing Collection glass negative. Update: This photo appeared in the October 1916 issue of Popular Science with the caption "Preparing to examine an employee in the United States Treasury Department to determine the effect of work on the eyes." View full size.