
Early Concepts of the Senses and the Mind
Man's understanding of how he perceives the real world was advanced in the 17th century by men who separated answerable physical questions from unanswerable metaphysical questions

Early Concepts of the Senses and the Mind
Man's understanding of how he perceives the real world was advanced in the 17th century by men who separated answerable physical questions from unanswerable metaphysical questions

Descartes
This extraordinary Frenchman is principally remembered for his invention of analytic geometry, but he attempted far more. His aim was nothing less than to reduce nature to mathematical law

Helmholtz
This 19th-century German was a deep and versatile investigator. Although he had been trained as a physician, he made important contributions to physics, physiology and the theory of knowledge