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.
Oops, car trouble. I don't think it ruined the vacation much since there are so many other pictures of the Yosemite vacation. Doing a little bit of research, it's a Mercury, likely a 1939. CORRECTION: It is a Ford, was correct originally. View full size.