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:

Washington, D.C., circa 1919. "Washington Battery Co., L Street." We saw the garage earlier in this post. National Photo Co. glass negative. View full size.

Washington, D.C., 1931. "Auto accident." I will leave it up to Shorpy Nation to determine the location and make of this dented dreadnought. 8x10 safety negative, National Photo Company Collection. View full size.

Washington, D.C., circa 1925. "J.C. Weedon & Co., Haines Bldg." Adolph Nachman's furniture store at Eighth Street and Pennsylvania Avenue S.E., with signs directing customers to the newer store at E and Eighth streets N.W. 8x10 inch safety negative, National Photo Company Collection. View full size.

May 13, 1924. Washington, D.C. "Teddy Roosevelt 3d at circus." Last seen in our previous post as a budding boxer. National Photo Co. View full size.

March 22, 1924. Washington, D.C. "Theodore Roosevelt III, boxing." National Photo Company Collection glass negative. View full size.

June 6, 1914. "Shipping and wrapping room, Gordon Pagel Baking Co., Detroit." 8x10 inch dry plate glass negative, Detroit Publishing Co. View full size.

August 31, 1912. "Dime Savings Bank and Detroit City Hall." 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.