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.

Philadelphia circa 1928. "Atwater Kent Factory for T.R. Shipp." Assembling the Atwater Kent Model 47, back when radios were the iPad of their day. National Photo Company Collection glass negative. View full size.
in this building in the early 90s when it was the home of the US Dept of Veterans Affairs Regional Office and Insurance Center. By then the interior of the original sawtooth roof had been coverd by a dropped ceiling, but it was accessible. It still had the original wooden floors, covered in most places with carpeting but visible in the aisles between offices and cubicles.
The VAROIC demolished the builing in the late 90s. The building's footprint is now occupied by the parking lot for the replacement building. On a prominent corner of the property a large section of the sawtooth roof truss is mounted on columns as if it were a sculpture-like artwork. The site is bounded by US 1, Wissahickon Ave., and a regional passenger rail line.
Always makes the young people roll their eyes.
By the look of the head gasket, it's a 4 cylinder model.
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