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.
March 27, 1926. "William H. Egberts examining trepanned skulls in the anthropology laboratory at the National Museum. The crude method of trephining with the sharpened edge of a stone practiced by peoples living in Peru some 500 or 600 years ago is revealed." National Photo Co. View full size.