The Auto­­mat­ic-inverseur is a device used for the auto­mat­ic trans­po­si­tion of stereo neg­a­tives and the pro­duc­tion of devel­oped pos­i­tive stere­oviews on glass. The device con­sists of a frame fit­ted with a cov­er enclos­ing the neg­a­tive and pos­i­tive plates. The frame includes an aper­ture through which light …