Realizing the importance of having a large collection of specimens illustrating the gross pathologic conditions, kept or preserved in their natural shape, size and color, in presenting the subject of pathology to medical students, and being unable to obtain a sufficient amount of material from recent autopsies and operations to meet the needs of a properly conducted course, I have, for the last few years, been paying considerable attention to the different methods of making permanent museum preparations so that whenever a good pathologic specimen is obtained it may be used repeatedly for demonstration.
Although I have repeatedly tried several of the methods recommended by different workers during recent years, none has proved so valuable as the Kaiserling method. When using flat jars, the specimens can be so arranged as to have the principal pathologic part next to the glass and in that way best exposed to view. It often