A few more details about Purkinje, quoted from "Chambers's Encyclopedia": JOHANNES EVANGELISTA PURKINJE (1787-1869) Czech physiologist, born at Lobkowitz, studied theology and medicine at Prague, where he graduated in 1819. H aving obtained the chair of physiology at Breslau (1823), he carried out important research and opened the first phisiological institute there (1842). In 1850 he was called to the chair in Prague but then became active in politics. Purkinje was a pioneer histologist. One of the first to use a microtome, he described the germinal vesicle, and cerebellar cells and fibres in cardiac muscle which bear his name. He also did important work in the physiology of vision. For further references mention is made of "Pathfinders in Medicine" by V Robinson (1929). Another titbit: The term "protoplasm" was first applied by Purkinje in 1840 to the material in animal embryos. Kind regards, Jan Hers, Sedgefield, South Africa.