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Mikroskopische Untersuchungen über die Uebereinstimmung in der Struktur und dem Wachstum der Thiere und Planzen.
. Berlin, Sander, 1839, 8°, XVIII, 270 pp., mit vier Kupfertafeln, Halbleinenband der Zeit.. RARe FIRST EDITION ! - Theodor Schwann's (1810-1882) "rejection of the Hegelian notion of "vital forces," and his search for the underlying mechanical and structural principles common to all life, led him to develop and revise his friend Schleiden's Urglastheorie (watch-glass theory) of plant cell formation into the general theory of the cell as basis and origin of life. This first announcement of the author's pioneer discovery that a similar cellular origin is common to everything living, is one of the great classics in the history of biology and the foundation of the cell theory for plants and animals. The first part of the book is a thorough, detailed description of the structure and growth of the spinal cord, with an elaboration of Theordor Schwann's (1810-1882) thesis that cells are the basis of all tissue in the animal body. The second part contains sections on the ovum, the cellular structure of other tissues, a summary, and a defense of the cell theory against criticism made of it. Schwann discovered the cells that form a sheath surrounding nerve axons and conducted experiments that helped disprove the theory of spontaneous generation. He coined the word metabolism to define the chemical changes that take place in cells and he demonstrated that yeast organisms cause fermentation of sugar solutions. In addition, he discovered pepsin, the first digestive enzyme prepared from animal tissue, and formulated the basic principles of embryology by observing that the egg is a single cell that eventually develops into a complete organism. - Mainly devoted to the investigation of the elementary structure of animal tissues, Schwann's Untersuchungen had an important bearing on the development of the doctrine of the cell structure of animal tissue. In this work Schwann discarded Schleiden's Uhrglastheorie and put forward a theory of his own. In the same wortk he described the neurilemma, the "sheath of Schwann". - See - M.Florkin, Naissance et deviation de la theorie cellulaire dans l'oeuvre de Theodore Schwann. Paris, Hermann, 1960. - - Garrison & Morton No.113; PMM 307b.; Mayr, pp.655-656; Norman 1914; Dibner, Harals, 197; Horblit 93a
      [Bookseller: Antiquariat für Medizin - Fritz-Dieter S]
Last Found On: 2014-10-29           Check availability:      ZVAB    


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