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.
November 1942. "Pittsburgh, Pennsylvania (vicinity). Montour No. 4 mine of the Pittsburgh Coal Co. Mine car operating off a trolley cable." Medium-format nitrate negative by John Collier for the Office of War Information. View full size.
Shorpy.com | History in HD is a vintage photo blog featuring thousands of high-definition images from the 1850s to 1950s. The site is named after Shorpy Higginbotham, a teenage coal miner who lived 100 years ago.