I think this might be a tintype in a daguerreotype box as the photo does not disappear when you tip it. I don't know who this is. Mom may have notes somewhere identifying him. Not sure but he is obviously a Civil War soldier.
The daguerreotype boxes were lovely. Daguerreotypes are easily damaged from oxidation from the air and also fingerprints, thus were kept in airtight boxes under glass.
This is a double daguerreotype but I don't know of whom. Mom was very good at labeling many photos but not these. I had a hard time photographing it as the images disappear with any bit of light on them. I went into a closet but all I could see was myself mirrored back. Finally I took the photo at an angle.
Jacques Daguerre is thought of as having invented this photographic method in the 1830's which creates an image on a copper plate via an amalgam of mercury and silver. When I read about the method my eyes cross and my brain gets mucked up so I refer you to the wikipedia article which frankly I don't think is that well written.
Unidentified young girl, a tintype in a paper folder. A tintype was easier to make than a daguerreotype and thus became a popular way to obtain family photos. The photo was made by creating a direct positive on a sheet of metal. Check here for more details.
Tiny tintypes. From the Hull family.
My great-great grandmother. A tintype cut rather sloppily. The tintypes also must be kept in the dark ( this is my understanding anyway). The picture can chip off with rough handling.