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.

Circa 1904. "Dynamo room with switchboard." Seen earlier here. 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

Circa 1904 somewhere in North America. "Switchboard in dynamo room." (UPDATE: Also seen here.) 8x10 inch glass negative. View full size.

New York circa 1924. "L.M. Cockaday and Maj. Kendall Banning." 5x7 glass negative, George Grantham Bain Collection. View full size.

December 23, 1936. Washington, D.C. "Bureau of Standards. Standardization of card colors. Kenneth Kelley judging colors of dyes." Whatever you labor at, Shorpy wishes you a happy Labor Day. Harris & Ewing glass negative. View full size.

Washington, D.C., circa 1920. "Daniels and Navy telephone exchange." Josephus Daniels, Secretary of the Navy. National Photo glass negative. View full size.

June 1940. Washington, D.C. "Direct postal telegraph wire at a truck service station on U.S. 1 (New York Avenue)." So the place was something of an Internet cafe, without the lattes or wifi. 35mm negative by Jack Delano. View full size.

Washington, D.C., circa 1932. "Ben Franklin Press" is all it says here. National Photo Company Collection glass negative. View full size.