FIGURE 4. A-I in Collection management and study of microscope slides: Storage, profiling, deterioration, restoration procedures, and general recommendations

FIGURE 4. A-I. Double-coverslip slides with frames of different materials: aluminum (A, Cobb slides), plastic (B, C: Higgins-Shirayama slide with rectangular opening in B and circular opening in C; D, E: aged plastic, coverslip held in place by label paper and detached in D, see arrowheads), thin (F) or thick (G, H) cardboard, and wood (I, coverslip held in place by paper strips). Notice that certain types of plastic and cardboard slides bend upwards centrally (C, E, H) or get easily distorted (D). J. Stains faded and unknown mounting medium yellowed in the periphery of the coverslip. K. Slide with cardboard labels and spacer consisting possibly of coloured paper tissue. Mounted as glycerol-paraffin mounts between 1999 and 2010 by Neuhaus (A), in Hoyer's medium between 2000 and 2001 by Song and Chang (B) and between 1998 and 2004 by Higgins (C), in Canada balsam after 1925 by Schultze or Heider (D, probably E), in gum dammar dissolved in xylene after 1925 by Heider (F-H), and between 1874 and 1890 by Marenzeller (K). A-K: macro lens. Scalebars: A-K, 2 cm.