Astronomer Charles Piazzi Smyth’s 1864–65 expedition to measure the Great Pyramid of Giza was planned around a system of linear measures designed to guarantee the validity of his measurements and settle ongoing uncertainties as to the Pyramid’s true size. When the intended system failed to come together, Piazzi Smyth was forced to improvise a replacement that presented a fundamental challenge to the metrological enterprise upon which his system had been based. The astronomer’s new system centered around a small lump of (...) basalt, now held at Cambridge’s Whipple Museum of the History of Science, which nucleated a wide array of material and scientific considerations. Through a bipartite analysis of the physical and narrative dimensions of Piazzi Smyth’s basalt Standard, I develop the implications of its use and construction for understanding the material constitution of scientific instruments. In particular, I illustrate how instruments are locally constituted through co-accountable systems and how their material features become integrally implicated in both their uses and meanings. (shrink)

The inclusion of engineering standards in US science education standards is potentially important because of how limited engineering education for K-12 learners is, despite the ubiquity of engineering in students’ lives. However, the majority of learners experience science education throughout their compulsory schooling. If improved engineering literacy is to be achieved, then its inclusion in science curricula is perhaps the most efficient means. One significant challenge that arises, however, is in the framing of engineering relative to science by both teachers (...) and curriculum. Science and engineering are both distinct and interdependent. The nature of the contributions of science and engineering to one another has been an area of some examination in philosophy of technology and engineering, but little framing of this relationship has been conducted with K-12 science and engineering education contexts in mind. Nature of science is a critical layer of scientific understanding that has been used to explicitly support literacy in K-16 science classrooms for decades. However, engineering cannot be authentically and appropriately supported by NOS framing. There is an immediate need for discourse on the nature of engineering knowledge but not in isolation of NOS. Given the increasing inclusion of engineering in science classrooms, relationships between NOS and NOEK are in need of explication and argument. Our purpose is to promote a discussion about NOS, engineering, and the relationship between them without misrepresenting engineering as a subdomain of science or as an oversimplification of itself. (shrink)

To one side of the wide third-floor hallway of Victoria College, just outside the offices of the Institute for the History and Philosophy of Science and Technology, lies the massive carcass of a 1960s-era electron microscope. Its burnished steel carapace has lost its gleam, but the instrument is still impressive for its bulk and spare design: binocular viewing glasses, beam control panel, specimen tray, and a broad work surface. Edges are worn, desiccated tape still feebly holds instructive reminders near control (...) dials; this was once a workhorse in some lab. But it exists now out of time and place; like many of the scientific instruments we study, it has not been touched by knowing hands in decades. (shrink)

Despite its potential implications for the objectivity of scientific knowledge, the claim that “scientific instruments are perspectival” has received little critical attention. I show that this claim is best understood as highlighting the dependence of instruments on different perspectives. When closely analyzed, instead of constituting a novel epistemic challenge, this dependence can be exploited to mount novel strategies for resolving two old epistemic problems: conceptual relativism and theory-ladeness. The novel content of this article consists in articulating and developing these strategies (...) by introducing two fine-grained notions of perspectives as the key units of analysis: “broad perspectives” and “narrow perspectives.”. (shrink)

In 2017 a clock from the collection of the Mathematisch-Physikalischer Salon in Dresden was dismantled. This clock had been made around 1767 by Johann Gottfried Köhler (1745–1800), who was then in...

Historians have used university statutes and acts to reconstruct the official astrology curriculum for students in both the arts and medical faculties, including the books studied, their order, and their relation to other texts. Statutes and acts, however, cannot offer insight into what actually happened during lectures and in the classroom: in other words, how and why astrology was taught and learned in the medieval university. This paper assumes that the astrology curriculum is better understood as the set of practices (...) that constituted it and gave it meaning for both masters and students. It begins to reconstruct what occurred in the classroom by drawing on published and unpublished lecture notes. These offer insight into how masters presented the material as they did, and why. The paper argues three points: first, the teaching of astrology centered on demonstrations involving astrological instruments: specifically, various kinds of paper astrolabes. Second, the astrological instruction focused on conveying the pragmatics of astrology rather than esoteric, theoretical issues. Finally, astrology as it was taught in the arts curriculum was explicitly intended to provide a foundation for students who would advance to study medicine at the university. (shrink)

Measurement was vital to nineteenth-century engineering. Focusing on the work of the Stevenson engineering firm in Scotland, this paper explores the processes by which engineers made their measurements credible and explains how measurement, as both a product and a practice, informed engineering decisions and supported claims to engineering authority. By examining attempts made to quantify, measure and map dynamic river spaces, the paper analyses the relationship between engineering experience and judgement and the generation of data that engineers considered to be (...) ‘tolerably correct’. While measurement created an abstract and simplified version of the river that accommodated prediction, this abstraction had to be connected to and made meaningful in real river space despite acknowledged limitations to measuring practice. In response, engineers drew on experience gained through the measuring process to support claims to authoritative knowledge. This combination of quantification and experience was then used to support interventions in debates over the proper use and management of rivers. This paper argues that measurement in nineteenth-century engineering served a dual function, producing both data and expertise, which were both significant in underpinning engineering authority and facilitating engineers’ intervention in decision making for river management. (shrink)

These three books illustrate some key themes in the history of science and the history of microscopy. First is a new enthusiasm among some historians and philosophers of science to embrace the history of microscopy as an area worthy of study, a recognized area of investigation for the historian and philosopher of science. In so doing these historians have redefined the subject area from the more traditional and much researched history of microscopes, with its emphasis on the technical, to a (...) consideration of the community of practitioners of microscopy and the theoretical contexts in which they carried out their studies. They have attempted to view the practice of microscopy and its practitioners within a conceptual, philosophical, and social context. They have by no means excluded technical considerations, but have argued that those alone can explain neither the rise, flourishing, and apparent decline of microscopy in the seventeenth and eighteenth centuries, nor its resurgence in the nineteenth century. Rather, they have argued that an analysis of microscopy must include social and conceptual considerations in addition to the technical. With these three books we have moved at last from the history of microscopes to the history of microscopy, within the context of the history and philosophy of science. The history of microscopy can now take its place within the larger inter-disciplines of HPS and STS. (shrink)

The ArgumentThis essay addresses the historiographical question of how to study scientific instruments and the connections between them without rigidly determining the boundaries of the object under historical scrutiny beforehand. To do this, I will explore an episode in the early history of the tachistoscope — defined, among other things, as an instrument for the brief exposure of visual stimuli in experimental psychology. After looking at the tachistoscope described by physiologist Volkmann in 1859, I will turn to the gravity chronometer, (...) constructed by Cattell at Wundt's Leipzig institute of psychology in the 1880s. Taking Wittgenstein's notion of family resemblances as a methodological suggestion to travel from one member to another to find out just how members relate to one another, I will investigate part of the family to which both the tachistoscope and the gravity chronometer turn out to belong. A detailed analysis of these instruments, using both historical sources and historical accounts of psychological instruments, may demonstrate that the instrument is not a standard package that, if well applied, will simply secure good results. Each package needs to be assembled again and again; the particular package that is assembled may differ on different occasions. Thus an alternative is developed to an understanding of instruments as univocally functioning material means. (shrink)