GENERAL CONSIDERATIONS The study of the finer retinal details is a work filling the whole life of scientists. Some of these, such as Ramón y Cajal, Held, Max Schultze, Río Hortega, Schaffer and Mawas, used the most delicate methods of hardening, embedding and staining and published an admirable record of most important results. Other investigators, e. g. Fortin, remained independent in their opinion—sometimes different from the acknowledged one. I want to describe here, with the help of some photomicrographs, a method not generally used by the histologist and its results. My teachers of histology, the well known Siegmund Mayer and Alfred Kohn, stressed the fact that by observing the unstained tissue one would learn many new details and realize the true nature of the organic structure sometimes better than by fixing, embedding and staining. The more complicated the methods the more decomposition of the texture one has to expect and