منابع مشابه
The Flicker Response Curve for Fundulus by W. J. Crozier and Ernst Wolf
A number of vertebrates have been examined by us as to the form of the interdependence of flash frequency (F) and flash intensity (I) for reaction to visual flicker. The technic, apparatus, and procedure have been uniform in all these cases. There has been used, except in special experiments, a flash cycle in which light time and dark time are equal, and the temperature is the same (21.5°). We ...
متن کاملThe Flicker Response Contours for Genetically Related Fishes. Ii* by W. J. Crozier and Ernst Wolf
A primary condition of rational physiological analysis is the discovery of organic invariants. An organic invariant is a property of the organism expressing its capacity to exhibit a particular kind of performance. The property clearly must be determinate, 1 in the sense that it is experimentally recoverable in adequate repetitions of the observations, else we have no right to regard it as expr...
متن کاملJ. B. S. Haldane, Ernst Mayr and the Beanbag genetics dispute.
Starting from the early decades of the twentieth century, evolutionary biology began to acquire mathematical overtones. This took place via the development of a set of models in which the Darwinian picture of evolution was shown to be consistent with the laws of heredity discovered by Mendel. The models, which came to be elaborated over the years, define a field of study known as population gen...
متن کاملRobert J . Richards , The Tragic Sense of Life : Ernst Haeckel and the Struggle over
Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive...
متن کاملErnst Mayr, a retrospective.
During the late summer of 1979, Ernst Mayr and I (Figure 1) had finished editing The Evolutionary Synthesis: Perspectives on the Unification of Biology [1]. He knew that I was working on a long essay about Theodosius Dobzhansky and also planning a book about Sewall Wright. From his farm in Wilton, New Hampshire, Ernst handwrote me a letter (Figure 2) from which this excerpt is taken: ‘In your w...
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ژورنال
عنوان ژورنال: Review of Middle East Studies
سال: 2011
ISSN: 2151-3481,2329-3225
DOI: 10.1017/s2151348100002330