Sigwart, Christoph (1830-1905)(2)
Spencer, Herbert (1820-1903)(2)
Carpenter, William Benjamin (1813-1885)(1)
Galilei, Galileo (1564-1642)(1)
Hegel, Georg Wilhelm Friedrich (1770-1831)(1)
Mersenne, Marin (1588-1648)(1)
Nietzsche, Friedrich (1844-1900)(1)
Pfänder, Alexander (1870-1941)(1)
Sidgwick, Henry (1838-1900)(1)