A Mechanico-Physiological Theory of Organic Evolution
By Carl Nägeli
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A Mechanico-Physiological Theory of Organic Evolution - Carl Nägeli
Carl Nägeli
A Mechanico-Physiological Theory of Organic Evolution
EAN 8596547232377
DigiCat, 2022
Contact: DigiCat@okpublishing.info
Table of Contents
MECHANICO-PHYSIOLOGICAL
ORGANIC EVOLUTION
SUMMARY.
APPENDIX.
BRIEF STATEMENT OF THE WORK OF THE OPEN COURT PUBLISHING COMPANY
A Partial List of Books in the OPEN COURT SCIENCE SERIES
PROBLEMS OF SCIENCE BY FEDERIGO ENRIQUES
Send for complete list. OPEN COURT PUBLISHING CO. (Scientific and Educational Books) 122 S. Michigan Ave. Chicago
A
MECHANICO-PHYSIOLOGICAL
Table of Contents
THEORY OF
ORGANIC EVOLUTION
Table of Contents
BY
CARL VON NÄGELI
SECOND EDITION
CHICAGO
THE OPEN COURT PUBLISHING CO.
1914
PREFATORY NOTE.
Table of Contents
Mr. V. A. Clark, as a student in horticulture in the University of Vermont, first undertook a critical examination of Nägeli's Mechanico-Physiological Theory of Evolution as a part of his regular junior work. After a half year's study and the preparation of a short thesis, Mr. Clark had become so far intimate with Nägeli's work as to make it seem best for him to continue the study through his senior year. This study involved extended translations from the text, including Nägeli's Summary, which, considering its difficult accessibility to American students, has been chosen for publication. The work has been done chiefly by Mr. Clark, but has all been under my immediate supervision, and I have given the whole matter a final restudy and revision. Those who have had any experience with similar work will know how impossible it is that all mistakes should have been avoided, and it would be a kindness to the translators if readers would point out any defects, in order that they may be corrected.
F. A. WAUGH.
University of Vermont,
July 1, 1898.
A MECHANICO-PHYSIOLOGICAL
THEORY OF ORGANIC
EVOLUTION.
Table of Contents
SUMMARY.
Table of Contents
In this summary I shall in general pursue a course the reverse of that which my main work follows.[A] I shall proceed from the primitive, unorganized condition of matter and endeavor to show how organized micellar substance has arisen in it, and how, from this micellar substance, organisms with their manifold properties have arisen. Since such a synthesis of organisms out of known forms of matter and force is still far removed from a conclusion strictly in accord with physical law, the process becomes comprehensible and obvious only by exact knowledge of the discussion that has preceded. Although the synthetic method reveals more clearly the weaknesses of the theory than do analytic investigations, yet I considered it helpful to make this presentation in order to give a clearer idea of the mechanico-physiological theory, and at the same time to test its worth.
1. FORMATION OF UNORGANIZED BODIES (CRYSTALS).
When separated and promiscuously moving molecules of any substance in solution or in a melted condition pass into the solid form by reason of removal of the causes of separation and motion (warmth or solvent), they arrange themselves into solid masses impermeable to liquids. These minute bodies grow by accretion, and when molecular forces are permitted to act undisturbed, assume the regular outer form and inner structure of crystals. The number of crystals, their size, changes of form and growth, all depend on external conditions.
2. FORMATION OF LIVING ORGANIZED (MICELLAR) BODIES.
Certain organic compounds, among them albumen, are neither soluble, despite their great affinity for water, nor are they fusible, and hence are produced in the micellar form. These compounds are formed in water, where the molecules that arise immediately adjoining each other arrange themselves into incipient crystals, or micellæ. Only such of the molecules as are formed subsequently and come in contact with a micella contribute to its increase in size, while the others, on account of their insolubility, produce new micellæ. For this reason the micellæ remain so small that they are invisible, even with the microscope.
On account of their great affinity for water the micellæ surround themselves with a thick film of it. The attraction of these micellæ for matter of their own kind is felt outside this film. Hence the micellæ with their films unite themselves into solid masses permeated with water, unless