8. Renaissance Period 15 Century
• Copernicus
• Galileo
• Francis Bacon
• Descartes
• Robert Hook
• Thomas Hobbes
• John Locke
• David Hume
• August Comte
• Immanuel Kant
9. Modern Period 19-20 Century
E.H. Weber
Gustav Fechner
Charles Darwin
Francis Galton
Hermaun Helmholtz
J. Muller
Paul Baroca
Wilhelm Wundt