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.
Vintage photos of:
Circa 1905. "Gas holder, Detroit City Gas Company." A familiar sight from the era of "city gas," when municipalities had their own gas plants in the days before long-distance transmission of natural gas. The telescoping sections rose or fell as "illuminating gas," which was made by heating coal, was put into or removed from the holder. 8x10 inch glass negative, Detroit Publishing Co. View full size.