Jan Janský (April Prague – September was a Czech serologist, neurologist and psychiatrist. He is credited with the first classification of blood into the four types (A, B, AB, O) of the ABO blood group system.
Jaroslav Heyrovský (Czech pronunciation: [ˈjaroslaf ˈɦɛjrofskiː] ( listen)) (December 1890 – March was a Czech chemist and inventor. Heyrovský was the inventor of the polarographic method. He was awarded the 1959 Nobel Prize for Chemistry.
A Cabinet of Wonder ! "Musei Wormiani Historia", the frontispiece from the Museum Wormianum depicting Ole Worm's cabinet of curiosities" - from Wikipedia. The Kunstkammer was regarded as a microcosm or theater of the world, and a memory theater.