ABSTRACT
He wrote a paper on the measurement of the rate of conduction of the nervous impulse, invented some very important optical instru ments, and also completed his Handbuch der physiologischen Optik. It was during these years, too, that Helmholtz became interested in empiricism; a careful study of the great English empiricists influenced his development gradually away from Kantian philosophy in the direc tion of Locke, Hume, and Mill.
