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A Bäumer-Schleinkofer

Publications and source records attributed to A Bäumer-Schleinkofer.

4 recordsLinked to original sources
PubMed1996

[Not Available].

Ewald Hering's color-opponent-theory is still considered one of the foundations of the visual sciences. Prior to Hering, Hermann v. Helmholtz introduced a theory of color appearance, which was based primarily on the physical aspects of the stimulus. In contrast to Helmholtz, Hering's theory strongly emphasized the subject's perception of color. As a consequence, Hering considered Helmholtz' theory inadequate. Contrary to some historical accounts, he did not object to Helmholtz's three-receptor explanation for color-mixture. Instead of Helmholtz's fundamental colors red, green, and blue ; and black-white. Helmholtz, on the other hand, refused to accept Hering's theory. Finally, a student with Helmholtz, Johannes v. Kries, developed the so-called "zone-theory", which combines both, Young-Helmholtz's and Hering's theory at different stages of the visual information processing system.

Color Perception↗
PubMed1994

[Not Available].

The primary goal of Ulisse Aldrovandi was to surpass his immediate predecessor Conrad Gesner, despite the fact that he never mentioned it expressis verbis. In a Plinian manner he attempted to complete Aristotle's comprehensive description of the animals. Since he always made a great effort to evaluate all existing works, and to determine their degree of truth by conducting his own studies of nature, his descriptions turn out to be more comprehensive and critical than those of his predecessors. Furthermore he based his studies on a system and also incorporated anatomy again. With his studies of nature and anatomical dissections he has expanded the knowledge of scientific facts within the domain of zoology. Especially in the realm of entomology, Aldrovandi has accomplished pioneer work, and can hence be regarded as the founding father of this special field. Besides Gesner's significant work about the animal kingdom, Aldrovandi's even more comprehensive encyclopedia can be considered an important step towards the modern natural sciences.

Anatomy, Comparative↗