1. 1) Ehrlich, P.: Arch. mikros. Anat. Entwick., 13, 1877.
2. 2) Möllendorrf, W. v. and Tomita, T.: Z. Zellfozsch., 3, 1925.
3. 3) Jancso, N. V.: Color transition and peptization of metachromasic dyestuff at boundary surfaces. Kolloidchem. Beihefte, 32, 143, 1930.
4. 4) Lison, L.: Phenomenon of metachromasia. Bull. Acad. r. Belg. Cl. Sci., 19 1933: Signification metachromasia. Compt. rend. soc. biol., 118, 1933: Bull. HistolL appl., 12, 1935: Protoplasma (D) , 24, 1935: Bull. soc, shim. biol., 18 1936.
5. 5) Kelly, E. G. and Miller, E. G.: Reaction of dyes with cell substances. I. Staining of isolated nuclear substance. J. Biol. Chem., 110, 113, 1935.