Given that many imaging technologies in biology and medicine are non-optical and generate data that is essentially numerical, it is a striking feature of these technologies that the data generated using them are most frequently displayed in the form of semi-naturalistic, photograph-like images. In this paper, I claim that three factors underlie this: (1) historical preferences, (2) the rhetorical power of images, and (3) the cognitive accessibility of data presented in the form of images. The third of these can be (...) argued to provide an epistemic advantage to images, but I will further argue that this is often misleading and that images can in many cases be less informative than the corresponding mathematical data. (shrink)

This article sets out to substantiate an understanding of the photographic image as a constellation of scaled relations, with a focus on the significance of historically neglected questions of scale in and for the present. It explores two recurrent themes in Walter Benjamin’s writings: his celebrated methodological-epistemological concept of constellation and his less often remarked fascination for relationships of scale, processes of scaling and the scale effects these produce. These are investigated in light of the mutable and composite character of (...) the contemporary photographic image and its unprecedented scale as a mass form. Key phenomena and prevalent conceptions of photography are approached as already structured by intercalated facts, operations and experiences of scale, scaling and scalability. On this basis, a constellation of three historical essays that examine questions of scale in photography is constructed. The guiding aim of this construction is that such a constellation might stand as a pre-history of scale and its significance in and for photography today. (shrink)

During the nineteenth century physiologists and clinicians developed several graphical recording systems for the mechanical registration of heart sounds. However, none of these replaced traditional methods of auscultation. The paper describes criticism of the aural sense as one of the driving forces behind the development of phonocardiography and analyses its variants from a technological and clinical perspective. Against the background of the physiological “method of curves,” the parameters that prevented the implementation of phonocardiography against overwhelming odds are highlighted. Contemporaries denied (...) specific evidence beyond auscultation. Many clinicians also feared that the art of auscultation was being undermined by the new, reproducible mechanical methods. The paper argues that phonocardiography was on the one hand regarded as impractical in clinical settings; on the other hand—and even more important—implicit practices, tacit knowledge and cultural models fostered skepticism against the new method. The argument of “self-evidence”—often connected to medical images, curves, graphs or tables—was not valid for the visualization of cardiac sounds in the opinion of the promoters of acoustic heart sound registration and its individual interpretation. Rather, the acts of subjective hearing and objectively reporting what was heard seemed “self-evident” for pathophysiological characteristics and the development of a diagnosis. Therefore, auscultation and phonocardiography coexisted with different emphases. While auscultation remained the method of choice for a bedside diagnosis, phonocardiography played its role in differential diagnostics or research settings. (shrink)

The research on media representations of biotechnology often neglects its pictorial representations. The article tries to fill this gap by looking at pictures of biotechnology in German magazines between 1980 and 2000. It tries to identify visual strategies of both proponents and opponents of biotechnology. It is argued that pictures are more ambivalent than texts. The different representations of scientists imply that in the argument over biotechnology the role of scientists in modern society in general is negotiated. For the opponents (...) the most important motive is the fear of dissolution of natural boundaries between species. In general, the pictures emphasize the cultural and emotional side of the debate which takes precedence over rational cost-benefit-analysis. (shrink)