Wilhelm Preyer Died on July 15, 1897

I

Wilhelm Preyer was a bold researcher, a fertile thinker full of stimulating ideas, a tireless seeker of new paths and goals in science and cultural life. Physiology was at the center of his work. His comprehensive mind was at home in all areas of natural science. His thoughts and facts flowed from everywhere, which he processed into the great body of ideas that he envisioned as physiology in the broadest sense of the word. His writings open up broad, spiritual vistas. It was quite impossible for him to tread well-trodden paths. What he attacked became something new through his work, through his thinking. He had a clear, unclouded view of everything significant that has occurred in the intellectual life of recent decades. He always knew what had a future. Ernst Haeckel says in the preface to Preyer's recently published biography of Darwin: "Like me, you belong to the small number of neuroscientists who, immediately after the publication of Darwin's epoch-making work on the origin of species, were convinced of its tremendous importance and who had the courage to firmly defend its fundamental views at a time when the vast majority of their peers were still hostile or dismissive." Preyer was not one of those scholars and thinkers who are happy in their narrowness, who acquire a sum of convictions through tradition and then take a few steps further themselves in the direction that is thereby marked out for them. The belief that they are following a safe path makes such scholars unsuitable for committing great errors. They do not take bold risks in science. Preyer dared a great deal. Some of his ideas are regarded as aberrations by his peers. Much of what he held as his view will prove to be untenable in the course of time. But he was more inspiring as an erring man than the others, who could not fail to be so, because great errors cannot be made in the circulation of small scientific coins. It is said of Lombroso that he liked the new in intellectual life simply because it was new. Something similar is true of Preyer. He liked to immerse himself in areas of science that were young. Hypnotism, graphology, the question of whether Bacon was the author of Shakespeare's plays, occupied him and inspired him to write writings and essays that are valuable and original, even though their content must meet with strong doubts. Preyer turned his work and his thoughts to things that seem so absurd to some that he does not even want to talk about them seriously. The scientific study of manuscripts was his favorite occupation in recent times. Finding the soul of man, his essence, his character in his handwriting was considered by him to be the task of scientific graphology. Scientific prejudices and a certain type of scholarly education have led many people to believe that it is unscientific to get involved in certain things. The majority of our scientific contemporaries are of the opinion that such things as graphology are incapable of scientific treatment. They arrive at such an opinion because they have formed very definite ideas about what is possible in nature and what is not. They simply reject what does not correspond to these ideas. Minds like Preyer cannot allow themselves to be captured by such ideas. They know how tenuous the "truths" are that make up the content of our sciences. They know how uncertain, how hypothetical much of what the majority of scientifically educated people regard as absolutely certain is. That is why they are convinced that even things that at first seem very doubtful can provide important insights and experiences. Nothing in spiritual life is so certain that one can say: because we recognize these or those laws about one area of nature, something else can only be counted as an impossibility. Everything must be tried, everything must be thought through: this was Preyer's leitmotif. It led him to his immensely interesting investigations into "The Soul of the Child". In the book he wrote on this subject there are more and more significant psychological experiences and ideas than in the writings of the exact fashionable psychologists who want to get close to the human soul through experimentation in the laboratory. Preyer has a keen eye for the intimate aspects of a child's life and a tremendous gift for deduction. His observations come together in an admirable way to form a great scientific edifice. Preyer is both a master of detailed work and an ingenious discoverer of great connections. His biography of Darwin is a masterpiece in terms of penetrating the subject matter with great effective ideas. In a few meaningful strokes, Preyer outlines the contribution that Darwinism has made to all areas of modern intellectual life.

Preyer is never interested in knowledge alone. He wants to put what he has gained through scientific observation at the service of life. His book "The Soul of the Child" not only has the task of exploring the human soul, but also the other task of creating a solid psychological foundation for education. "The realization that psychogenesis is the necessary foundation of pedagogy is becoming more and more apparent. Without the study of the development of the young child's soul, education and the art of teaching cannot be founded on solid ground. ... The art of making the young child become is much more difficult than that of training it prematurely," he says in the preface to the aforementioned work. The views he expressed on the necessary reform of the secondary school system flow from the same source. Preyer is radical here. He wants the classical grammar school education to be replaced by one in the spirit of the modern scientific approach. The knowledge that moves our time should be passed on to young people by the grammar school. One need only have the courage to think in the spirit of our time and one must agree with Preyer's ideas. Only despondent spirits who are averse to any reform can disagree here. Such spirits are afraid of any upheaval. They see how the old works; they cannot or do not want to imagine how the new will work. They want the old because it is comfortable. Lively minds like Preyer hate stagnation as such. They will always carry reformatory ideas with them because they want all things to always be in a state of becoming, in flux.

II

Preyer emphasizes that "every physiological system that claims to be complete is forced to fill numerous and large gaps with conjectures. And because these are always subjective, there is no physiological doctrine that enjoys general approval. The energetic thinker made extensive use of the right to make such assumptions. For he knew that facts usually only reveal their nature to the researcher when he has first formed hypothetical ideas about their connection. The law that ultimately proves to be the correct one can be very different from the one expressed in the form of a conjecture; after all, the latter first pointed the way that led to the former. Preyer made a bold assumption about the origin of life. His courage of thought did not allow him to stop at this fundamental question of all physiology. Many contemporary physiologists do not dare to say a word about this question because science does not seem to be far enough along for them. Others are of the opinion that in the not too distant future it will be possible to solve the riddle of the origin of life by artificially producing living matter from carbonic acid, ammonia, water and salts in the laboratory. This, they believe, will prove that living things in nature once developed from inanimate things through primordial generation. The organic processes will then only appear as complicated mechanical, physical and chemical processes, and it will be possible to explain them with the help of the laws of physics and chemistry, just as the phenomena of inorganic nature are explained today. A third type of researcher, however, considers this to be completely impossible. Bunge, for example, explains: "The more thoroughly, versatilely and thoroughly we strive to investigate the phenomena of life, the more we come to the realization that processes which we had already believed we could explain physically and chemically are of a far more complex nature and for the time being defy any mechanical explanation. ... All processes in our organism that can be explained mechanistically are just as little phenomena of life as the movement of leaves and branches on a tree shaken by a storm, or as the movement of pollen blown by the wind from the male poplar to the female." The latter is also roughly Preyer's opinion. He did not admit that living things could ever have arisen from inanimate things, because the organic law seemed to him to be of a higher order than the inorganic law. Either it took place in earlier epochs, which lie far behind us in the past, and no longer takes place today, or it took place in the past and is still taking place today. In favor of the former case, it is argued that during the rapid cooling of the earth's surface there were completely different conditions than now, different air and light, different distribution of solids and liquids, different chemical compounds and different temperatures of the oceans. It is therefore possible, according to well-known researchers, that the peculiar, non-recurring process of primordial generation could have taken place under such peculiar, non-recurring conditions until the earth's surface, gradually becoming more similar to the present one, had changed to such an extent that living bodies existed, but could no longer come into being without the interposition of living bodies." Preyer believes that this view is based on weak foundations. "It is incomprehensible what, once the conditions for the combination of dead bodies into living ones were in place, whereupon life arose and persisted, should change so that it could continue in its lowest forms and develop further, but could no longer renew itself through primordial generation, but only through procreation. There is no reason why, if once self-generation took place, it should not also take place now." The conditions that are necessary for life today must have already existed at the time of the primordial generation, otherwise the generated life could not have survived. The change in these conditions of life can therefore not be a significant one. If procreation was possible in prehistoric times, it must also be possible today. But all attempts to artificially produce living things from lifeless things in the laboratory have failed. "It is true," says Preyer, "that in the next few years more such experiments will be made, and in particular efforts will be made to produce artificially in the laboratory the conditions which alone are realized on the deep seabed, but no cogent argument can be advanced in favour of the view that a positive result can be obtained at all. The number of chemical elements that can be used for such experiments is small, and even if the quantitative ratios, the absolute quantities, the degrees of pressure and the temperatures of the individual ingredients are highly variable, the possibilities of mixing in experiments remain confined within relatively narrow limits, particularly with regard to the thermal limits that are conducive to protoplasmic movements alone."

Those who deny that living matter has developed from inanimate matter in the course of time, and yet wish to remain on the basis of today's natural science, must assume that living matter is uncreated, eternal. Eberhard Richter decided on this view. In May 1865 he defended the opinion that the germs of life are eternal. However, since they could not thrive on the earth when it was molten, they must have reached our planet from other celestial bodies later, when the cooling was sufficiently advanced. Richter says: "Astronomy shows that masses of fine substances float in space; from the almost disembodied comet tails to the meteor stones that glow in our atmosphere and frequently fall to earth. In the latter, chemistry has detected remnants of organic matter (coal) in addition to molten metals. The question of whether these organic substances, before they were destroyed by the incandescence of the aerolite, consisted of shapeless primordial ooze or of formed organic structures, is to be decided in favor of the latter, because we have corresponding experience of this in our atmosphere." After Richter has spoken of the fungal germs and infusoria present in the earth's air, he says: "But if microscopic creatures float so high in the earth's atmosphere, they can also occasionally, for example under the attraction of passing comets or aerolites, reach outer space and then be caught on another world body that has become habitable, i.e. that enjoys the appropriate warmth and humidity, and develop again through self-ascending activity." Richter links his basic idea to all sorts of things that are untenable. Nevertheless, it cannot simply be dismissed out of hand. It is a fact that numerous organisms, germs and eggs on earth can retain their viability for centuries without showing the slightest sign of life. Such living substances fall into a lifeless state when deprived of the necessary conditions of life, but they can be revived if the right conditions are created. They are called anabiotic. It could therefore be that the bodies that fall to earth from outer space contain substances in which there is dormant life that can be awakened on earth under suitable conditions. In this way, the once dead Earth could have been populated with life. This hypothesis is so unadventurous that Helmholtz and Thomson have spoken out in favor of its scientific justification.

Preyer nevertheless quite rightly describes it as inadequate. It achieves nothing. She says that life did not originate on Earth from something lifeless, but came to it from other world bodies. The same question is repeated for the other world bodies. Did it originate there from inorganic matter or was it eternally present? Preyer resorts to another hypothesis. Why should not the living, the primordial, be the first and the inanimate have developed from the living alone that was present at the beginning? Preyer finds the view quite justified that "through life processes alone, which were already present before the formation of the earth, everything inorganic came into being through excretion, solidification, decomposition, cooling of living bodies, as is also the case today". Preyer finds that the difference between the inorganic and the organic is often shown by natural scientists in a completely false light. Some inorganic processes can be seen as transitions from the inanimate to the living. They represent analogies of life activity, if one looks closely. "An obvious example is the sea, which breathes in the same air as we do, takes in many things as its daily food and assimilates them by dissolving them so that they become constant marine components. The sea as such - like an organism - can only exist within narrow temperature limits, because if it solidifies when it cools down too much or evaporates when it gets too warm, its life dies out. The oceans also show currents in their interior. Rivers carry water to them like veins carry the nourishing juice to the body parts. The ejecta of the sea, its dead parts, the ice, reactants and products of its metabolism are thrown onto the beach. It produces heat through the friction of its water masses against each other, and if it is colder than the air, it swallows up its heat. It constantly generates itself anew, like protoplasm... Fire, too, can generally be called alive. It breathes the same air that we breathe, and suffocates when we deprive it of it. It consumes with insatiable greed what its lambent organs seize and feeds on its prey. It grows with slow movement, beginning in the dark, like the germ imperceptible, then it glows, unfolds ever more rapidly, growing into a heaven-aspiring blaze and propagates itself with terrifying haste, sending sparks everywhere, giving birth to new fires." Imagine these phenomena, reminiscent of life, heightened to full vitality, and you have that state of the once living earth mass from which both the presently living and the presently lifeless have separated. Preyer does not assert that the simplest life-substance we know today was present from the beginning of the formation of the earth, but that the beginningless movement in the universe is not a merely mechanical or physical one, but that it is a living one, and that the simple life-substance must necessarily have remained after the bodies now called inorganic had been separated out by the life-activity of the glowing planet on its surface. "The heavy metals, once also organic elements, no longer melted and did not return to the cycle that had excreted them. They are the signs of the rigor mortis of premature gigantic glowing organisms, whose breath may have been luminous iron vapor, whose blood was liquid metal and whose food may have been meteorites."

A similar idea to Preyer was later put forward by G. Th. Fechner in his "Ideen zur Schöpfungs- und Entwicklungsgeschichte der Organismen". He also conceived of the universe as originally animate.

Preyer's view must attract philosophical minds. They will never be able to understand how the phenomena of life can be explained by the summation of mechanical, physical and chemical processes. That living things transform themselves into inanimate things is quite understandable and proven by daily experience; that living things develop from inanimate things contradicts all observation that penetrates into the essence of things. The inorganic processes are present in the organic body in a heightened form, in a form that they do not have within inorganic nature. They cannot increase themselves into organic activity, but must first be captured and appropriated by an organism in order to serve life.

In contrast to the hypothesis of primordial generation, Preyer's is the more philosophical one. More refined minds will agree with Preyer when he says: "It is indeed reasonable to assume that the life and warmth of celestial bodies and organisms in the narrower sense are not merely inseparably bound together by the same great laws, but in the last instance originate from the same source. The sun lives the most intense life. And even if our earth is only its satellite, it still has light from its light, warmth from its warmth and in its 'womb life from its life: and it is no mere fantasy to think that we humans also originally come from the fire in the firmament."

III

Preyer derives the lifeless from the living. For him, the universe is a large, all-encompassing organism. From this view, it is only one step to the further step of imagining the world as an animated, spirit-filled organism. Preyer has also taken this step. He regards the propositions of mechanics, "matter is dead; it does not feel", as an aberration. He assumes that even the smallest, apparently dead body particle is endowed with sensation, i.e. with spirit. It corresponds to the facts to assume that "nowhere is there a sharp boundary between sentient and insentient beings, but that all matter has a certain capacity for sensation, which, however, can only give rise to sensation in a certain, extremely complicated arrangement and movement of the particles. Hence the simple substances, the dead bodies, even if they are in part very easily changed by slight influences, cannot, in spite of their dark sensory faculty, feel perceptibly, but as soon as they become components of the gray matter of the brain or only of the living protoplasm (through the ingestion of food), together with others, in an incalculably complicated movement, the sensation arises explosively, if an impression is now exerted on them."

The spirit originally slumbers in matter, but it is active in this slumbering state, it shapes matter, it organizes it until it has assumed such a form that it can itself appear in a manner appropriate to it. This is the leitmotif that Preyer is guided by in all his. Preyer's observations and thinking in physiology and psychology. He did not want to follow organic development merely to see how one form emerges from the other. He sought in the activity, in the function that an organ ultimately has to perform, the reason why it develops in a certain way. "What determines the final form in the development of the stem? I answer: the function. Only when this is activated does the differentiation of the substrate of the original beings begin. It is not the organ from which the function has to derive its origin, but originally the reverse is the case. The functions create their organs. Or, to avoid an expression that is difficult to define, one can say: the need determines the organic form, which is then inherited and only precedes the function in the embryo of higher animals, at least in the disposition." For Preyer, the highest, the last thing that comes into being is the creator of the first, of what precedes it in time. "Every single function of man must be traced step by step, once in individual life back to its first appearance in the living egg and then in the series of animals that are still close to his ancestors, and from these further on to the protoplasm, which is no longer animal, nor plant, but only living. Then one will begin to know where the higher and lower functions, for example speaking and seeing, as well as breathing and growing, come from, and how they have become what they are." The need to speak causes certain organs to undergo such a development that they ultimately become organs of speech. To anyone who views organic development in this way, the endeavor to explain the processes of life and soul mechanically can only appear as a historically strange aberration. "If physiology were really nothing other than physics and chemistry applied to the processes of life, then it would not be a science in itself, it would resemble technology and mechanical engineering and other applied disciplines," says Preyer, and he continues: "The fact that it could even come to be regarded and defined as the physics of organisms or the science of the mechanism and chemistry of living bodies is a historically important fact. The great error arose from the physical explanations of individual phenomena of life that have only become more frequent in this century, especially in recent decades, and from the many artificial reproductions of chemical products of animal and plant metabolism. ... No one doubts that research into the processes of life cannot progress without the continual utilization, application and development of physical and chemical principles and theories. But this does not mean that the science of life is nothing more than the physics and chemistry of living bodies... There are so many processes in the healthy organism which, remaining incomprehensible to physicists and chemists, do not even come within the scope of their investigations that the extension of physical-chemical explanations to them must also be called inadmissible, unscientific, arbitrary. This is a case of misguided induction, as is often observed in childhood: because many things taste good that end up in the mouth, everything must be put in the mouth."

Preyer has made a number of interesting observations in the field of sensory physiology and psycho-physiology and published the results of these in writings that are exemplary in their sharp formulation of what is presented. In my opinion, these works are also influenced by the idea that it is the mind that shapes the organism. What is the interaction between mind and body? How do the senses work to provide the spirit with what it needs to maintain itself? These are questions asked by those who believe that the spirit creates such an organic form for itself that it can manifest itself in a manner appropriate to its needs. Preyer made the dependence of muscle contraction on the strength of the stimulus exerted on the muscle on the one hand and the dependence of the movement triggered in the muscle on the stimulus on the other (the myophysical law) the subject of an important treatise (1874). He also investigated the nature of sensations ("Elemente der reinen Empfindungslehre", Jena 1877) and made observations about which vibrations are perceived as sound and which no longer manifest themselves as sound because they are too slow or too fast ("Über die Grenzen der Tonwahrnehmung", Jena 1876). His research into the nature of sleep, hypnosis and mind-reading all have the same origin: he wanted to recognize the intimate relationships between the spiritual and the physical. And his endeavors in the field of graphology are no less rooted in his basic idea. He wanted to recognize in the written word the spirit that had created its own body.