In this paper I present an interpretation of du Bois-Reymond’s thesis on the impossibility of a scientific explanation of consciousness and of its present importance. I reconsider du Bois-Reymond’s speech “On the limits of natural science” (1872) in the context of nineteenth-century German philosophy and neurophysiology, pointing out connections and analogies with contemporary arguments on the “hard problem of consciousness.” Du Bois-Reymond’s position turns out to be grounded on an epistemological argument and characterized by a metaphysical skepticism, motivated by the unfruitful speculative tendency of contemporary German philosophy and natural science. In the final sections, I show how contemporary research can benefit from a reconsideration of this position and its context of emergence, which is a good vantage point to trace open problems in consciousness studies back to their historical development.

This paper aims at understanding the concept of convention in mechanics as a notion transferred from the field of jurisprudence. This enables us to clarify it as a new epistemic category having a pertinent role in the transformation of mechanics in the nineteenth century. Such understanding permits a separation from linguistic and arbitrary conventions, thus highlighting its epistemic features and not transforming fundamental principles into mere arbitrary agreements. After addressing the main references in the literature discussing the role of convention in mechanics, we analyze its classical use as a concept originating from law. Then we explain its use by Carl G. Jacobi, Ferdinand F. Reech, and J. Henri Poincaré. Here we also show how their uses conform to the features analyzed regarding conventions in jurisprudence. Finally, we try to explain how the use of this concept, among other factors, contributed to the transformation of mechanics.

Argument

After having measured the velocity of the nervous impulse in the 1850s, Helmholtz began doing research on the temporal dimensions of visual perception. Experiments dealing with the velocity of propagation in nerves (as well as with aspects of perception) were carried out occasionally for some fifteen years until their final publication in 1871. Although the temporal dimension of perception seems to have interested Helmholtz less than problems of geometry and space, his experiments on the time of perception were technically rather subtle and seminal, especially compared with experiments performed by his contemporaries, such as Sigmund Exner, William James, Rudolf Hermann Lotze, Ernst Mach, Wilhelm Volkmann, and Wilhelm Wundt. Helmholtz’s conception of the temporal aspects of perception reflects the continuity that holds between psychophysiological research and the Kantian philosophical background.

What follows shall provide an introduction to a predominantly philosophical and polemical, but historically revealing, paper on the foundations of the theory of probability. The leading Russian probabilist Aleksandr Yakovlevich Khinchin (1894–1959) (see fig. 1) wrote the paper in the late 1930s, commenting on a slightly older, but still competing approach to probability theory by Richard von Mises. Together with the even more influential Andrey Nikolayevich Kolmogorov (1903–1987), who was nine years his junior, Khinchin had revolutionized probability theory around 1930 by introducing the modern measure-theoretic approach, which is still standard today and which allowed for a sufficiently general treatment of important new notions such as “stochastic processes.” This development had its first culmination in Kolmogorov's booklet, Grundbegriffe der Wahrscheinlichkeitsrechnung, written in German in 1933, which has exerted an enormous influence world wide.

The aim of this paper is to employ the newly contextualized historiographical category of “premodern algebra” in order to revisit the arguably most controversial topic of the last decades in the field of Greek mathematics, namely the debate on “geometrical algebra.” Within this framework, we shift focus from the discrepancy among the views expressed in the debate to some of the historiographical assumptions and methodological approaches that the opposing sides shared. Moreover, by using a series of propositions related to Elem. II.5 as a case study, we discuss Euclid's geometrical proofs, the so-called “semi-algebraic” alternative demonstrations attributed to Heron of Alexandria, as well as the solutions given by Diophantus, al-Sulamī, and al-Khwārizmī to the corresponding numerical problem. This comparative analysis offers a new reading of Heron's practice, highlights the significance of contextualizing “premodern algebra,” and indicates that the origins of algebraic reasoning should be sought in the problem-solving practice, rather than in the theorem-proving tradition.

Argument

This paper explores the relationship between the medium of motion-picture film and the representation of autobiographical memory during the middle decades of the twentieth century. The paper argues that a reciprocal relationship developed between film and memory, in which film was understood as an externalized form of memory, and memory an internalized record of personal experience similar in many respects to film. Memory was often represented as an object-like entity, preserved in stable form within the body, and able to be extracted by the right stimulus or trigger. A particularly important community in which this representation was developed was psychotherapeutic practitioners with psychoanalytic orientations, particularly during and shortly after the Second World War. In special circumstances, therapists and others claimed, records of past life events could be projected, film-like, onto the screen of an individual's conscious, replaying previous experiences in real time. The paper develops a social historical account of this relationship, and reflects on its significance for the history of selfhood in the twentieth century.

The paper focuses on the instrumentality of writing in the context of scientific research. It is suggested that the tool-character of writing is related to specific writing procedures, such as the list. These procedures can vary in their degree of complexity and often follow rules that are not codified. In any case, writing procedures can be characterized as non-material devices of “concretion.” Two examples from the notebooks of the physicist and philosopher of science, Ernst Mach (1838–1916), will help to develop the notion of writing procedures. Typical for Mach's use of his notebooks, they highlight the effects of writing in the context of reasoning and reflecting.

Scientific medicine carries within it an inherent contradiction. On the one hand, given its general scientific inquiry into health and disease, their conditions, etiologies, and treatments, it makes a claim for universality. To justify this claim, at different times and in different places, scientific medicine has prioritized techniques such as the medical gaze and autopsies to assure its diagnoses; it has applied numerical methods in order to have a better grasp of diseases and their possible treatments; it has used laboratory analyses in order to understand life at its molecular level; and more recently it has introduced Randomized Clinical Trials (RCT) in order to generalize clinical treatments. On the other hand, contrary to its universalistic claims, scientific medicine sets up and reifies boundaries. It creates distinctions between the healthy and the sick and defines categories, such as gender and race, that have deep political and social meanings.

Recognizing that social Darwinism is an intrinsically varied and composite concept, this essay advocates an approach delineating the various intellectual constituents and sociopolitical contexts. It is argued that German social Darwinism has often had a sophisticated biological content, and that the prevalent notion of the state as a biological organism has drawn on non-Darwinian biological theories. Different social interests and programs, institutional structures, and professional interests have also to be taken into account. Alternative interpretations stressing Nazi vulgarizations of biology have serious historical flaws. The paper considers the position of the historian Richard J. Evans, who has rejected interpretations of social Darwinism as scientific and medical discourse. While Evans stresses social Darwinism as public rhetoric, I suggest that social-Darwinist ideas have provided rationales for welfare policies and have had institutional, professional, and ideological implications. What occurred in crucial sectors of the emergent German “welfare state” was a shift from the legally trained administrators to specialists in such areas as public health and social work, who frequently looked to biology to legitimate policy.

Blood tests developed at the turn of the century could in some cases discern genetic relations. While such tests could never prove that a given individual had fathered a child in question, men of certain blood types could be exonerated from paternity of children with other blood types. Starting in the 1930s, scientists and lawmakers attempted to introduce such evidence into paternity or bastardy trials to attest to a man's innocence. Evidence from blood tests soon came to be used in divorce cases.

Blood tests appeared to be ideal for providing relevant information in cases when divorcing men claimed as a part of their suit that they had not fathered their ex-wife's child or children. Nevertheless, the courts remained reluctant to intro duce such evidence in divorce cases. This paper will argue that reluctance derived not from a distrust of the science, but from the courts' clinging to a definition of paternity that was not rooted in genetic connection.

Many judges and juries fell back on the pre-industrial assumption that once a man married a woman he was automatically the father of any children she bore. While this assumption flew in the face of scientific evidence, it did have the advantage of ensuring that the children of married women could not be bastard ized. The changing manner in which courts handled the tension between genetic paternity and traditional paternity in divorce cases reveals how society's views on paternity have evolved over the course of this century.

Argument

This paper is detective work. I aim to show that the brilliant Pythagorean mathematician Archytas of Tarentum was the founder of ancient Greek mathematical optics. The evidence is indirect. (1) A fragment of Aristotle preserved in Iamblichus is one of two doxographical notices to mention Pythagorean work in optics. (2) Apuleius credits Archytas with a theory of visual rays which saves the principle that the angle of reflection is equal to the angle of incidence. I argue that the source from which Apuleius got this information was the Catoptrics of Archimedes, the genuineness of which I defend against Knorr's hypothesis that it is the Euclidean Catoptrics, which had been misattributed to Archimedes. (3) The omission of optics from the mathematical curriculum in Plato's Republic, and the Timaeus' wholly physical account of mirror-images, can be explained as polemical, for it is well attested that optics was practiced in the Academy. The reason Plato does not mention optics is that he objected to Archytas using mathematics to understand the physical world rather than to transcend it.

The British Astronomer Royal, Nevil Maskelyne, spent four months on a Scottish mountainside in 1774, making observations of zenith stars and coordinating a detailed survey of the size and shape of the mountain Schiehallion, in order to demonstrate and quantify what was known as “the attraction of mountains.” His endeavors were celebrated in London, where it was stated that he had given proof of the universality of Newtonian gravitation and allowed for a calculation of the relative densities of the earth as a whole and the earth near its surface. This paper argues that the “Schiehallion Experiment” was as much a trial of the precision of Maskelyne's instruments and their expert management as it was a trial of Newtonian theory. By tracing the biography of the key instrument used by Maskelyne, his zenith sector, we see how much personal credibility was a stake for him in Scotland. By considering the mountainside as a place to test and reveal the precision of astronomical instruments we see a link between the Scottish endeavors and Maskelyne's ambitions for the Greenwich Observatory.

Argument

This article focuses on the specific ways in which Zionist scientists studying malaria in Mandatory Palestine (1920–1947) presented their work to international scientific circles, moving between the transnational aspects and the local aspects of their work on malaria while suffusing that work with nationalist meanings. This slippery yet seemingly unproblematic movement between the general and the specific, between the colonial world and Palestine, was a necessary mechanism of scientific exchange. In the Zionist case the work on malaria for these scientists was both a marker of their belief in progress and also a sign of their devotion to a specific political and social project. The knowledge imparted by Zionist malariologists and the international reception it received lent scientific legitimacy to the Zionist project while it advanced the goals of settling the land and defining the communal borders within Palestine between the Arab population and the Jewish one. In this way, the Zionist anti-malaria project in Palestine holds a unique place in malaria research of the time.

Einstein's concept of causality as analyzed in this paper is a thick concept comprised of: (a) regularity; (b) locality; (c) symmetry considerations leading to conservation laws; (d) mutuality of causal interaction. The main theses are: 1. Since (b)–(d) are not elements of Hume's concept of causality, Einstein's concept, the concept embedded in the theory of relativity, is manifestly non–Humean. 2. On a Humean conception, Newtonian mechanics is a paradigmatically causal theory. Einstein, however, regarded this theory as causally deficient, for it fails to comply with both (b) and (d). Special relativity was (partly) motivated by the wish to correct the first of these failures; general relativity the second. 3. Ironically, general relativity, based on the thick concept of causality, opens the way for a conventionalist understanding of that concept. 4. With regard to human freedom, Einstein professed to be a Spinozist. However, he suggested a version of soft determinism, not found in Spinoza.

The Thematic Apperception Test (TAT) was a projective psychological test created by Harvard psychologist Henry A. Murray and his lover Christina Morgan in the 1930s. The test entered the nascent intelligence service of the United States (the OSS) during the Second World War due to its celebrated reputation for revealing the deepest aspects of an individual's unconscious. It subsequently spread as a scientifically objective research tool capable not only of dredging the unconscious depths, but also of determining the best candidate for a management position, the psychological complexes of human nature, and the unique characteristics of a culture. Two suppositions underlie the utility of the test. One is the power of narrative. The test entails a calculated abuse of the subjects tested, based on their inability to interpret their own narrative. The form of the test requires that a subject fail to decipher the coded, unconscious meaning their narrative reveals. Murray believed the interpretation of a subject's narrative and the projection contained therein depended exclusively on the psychologist. This view of interpretation stems from the seemingly more reasonable belief of nineteenth-century Romantic thinkers that a literary text serves as a proxy for an author's deepest self. The TAT also supposes that there is something beyond consciousness closely resembling a psychoanalytic unconscious, which also has clear precedents in nineteenth-century German thought. Murray's views on literary interpretation, his view of psychology as well as the continuing prevalence of the TAT, signals a nineteenth-century concept of self that insists “on relations of depth and surface, inner and outer life” (Galison 2007, 277). It is clear the hermeneutic practice of Freud's psychoanalysis, amplified in Jung, drew on literary conceptions of the unconscious wider than those of nineteenth-century psychology.

In this paper, the perception of mathematics by a nonspecialist, the Romantic poet Friedrich von Hardenberg (Novalis), is investigated. The study is intended to contribute to a better understanding of the interactions between mathematics and the surrounding scientific culture in Germany at the turn of the nineteenth century. In regard to the problem how the cultural reception of a theory can influence its conceptual development, I argue that the reaction of nonspecialists can be imagined as a sort of resonating body. Some aspects of a theory are stressed, others are ignored or even suppressed. In this way the value system of a theory and thereby the choice of problems and the style of argumentation can be influenced by groups of people who are not active scientists. In fact, the case at hand shows that a change of values has taken place. The original aim of the combinatorial school, whose mathematics Novalis studied, was the mechanization of symbolical calculations. But later, presumably under the influence of the general cultural climate in Germany, this same mathematics was interpreted as furthering — in modern words — a study of abstract structures.

Eugenics, in whatever form it may be articulated, is based on the idea that phenotypic characteristics of particular individuals can be predicted in advance. This paper argues that biology's capacity to predict many of the characteristics exhibited by an individual, especially behavioral or cognitive attributes, will always be very limited. This stems from intrinsic limitations to the methodology for relating genotypes to phenotypes, and from the nature of developmental processes which intervene between genotypes and phenotypes. While genetic studies may generate valid population predictions for conditions which impact human health, neither genetics nor developmental biology are likely to generate useful individual predictions about variation in non-disease-related human behavioral and cognitive phenotypes in the foreseeable future.

Between February of 1797 and July of 1798, Francisco Barrera y Domingo, a Spanish surgeon, wrote an extensive treatise on slave medicine in the Caribbean. Entitled Reflexiones Historico Fisico Naturales Medico Quirurgicas, this 894-page manuscript accounts for eighteen years of its author's professional practice in the region. It provides a clear picture of daily life in the sugar plantations as seen through the eyes of a modest surgeon, thus presenting us with an opportunity to explore the ideological and intellectual universe of this “invisible” category of colonial practitioners. Despite its importance, Barrera's Reflexiones remains almost unknown. Only a handful of scholars have even acknowledged the existence of the volume and no systematic analysis of its content is available in English.

This article explores the scientific partnership between geology professor Gerard De Geer and his wife Ebba Hult following their marriage in 1908. De Geer was an influential participant in Swedish academia and international geology. Hult worked as his assistant until his death in 1943. The partnership was beneficial for both spouses, in particular through the semi-private Geochronological Institute, which they controlled. The article argues that marriage was a culturally acknowledged form of collaboration in the academic community, and as such it offered Hult access to geological research. However, the paper also argues that the gendered scientific institutions produced a fractured position. Partly, Hult managed to create her own role as researcher in geochronology. As a woman and a wife, however, she never moved out of her husband's shadow. Gender is understood as a relational category: Hult was an outsider who participated partially in standardized structures which gave great power to her husband and other men. The fact that she shared this status with other women in Swedish science at the time indicates the structural nature of their position. Nevertheless, they all had individual trajectories through academia. Indeed, the study of collaborative couples illustrates the multifaceted links between individual actions and the historical context of science.