Discusses the contributions of Hermann Von Helmholtz in the field of psychology. Hemholtz presented a pioneer work in the field of 'Conservation of Energy'. He applied the doctrine of the specific energies of the nerve, in the spheres of optics and acoustics. He maintained the diversity of the specific energies corresponding to differences of quality, within one and the same sense. 

Helmholtz established the distinction between sensation of color and perception of space. From a psychological point of view, the theory of color explains the simultaneous contrast. In acoustics, his work was based on the work of preceding researchers. His most valuable legacy is the inseparable union of scientific and philosophical research, and the profound conception of the mental life, grounded throughout upon actual facts. (PsycINFO Database Record (c) 2016 APA, all rights reserved)