This paper discusses two methodological notions, the concepts Gegenprobe (countercheck) and Gegenversuch (counter-trial), which were widely applied, discussed, relied upon, and defended in German-language writings about empirical inquiry. In the decades around 1800, they were common in physiology; medicine; agriculture; chemistry; various technologies, such as printing, metallurgy, and mining; accounting; and legal and political argumentation. The ubiquity of those concepts signals a broad concern with securing empirical findings and empirical knowledge. Gegenproben and Gegenversuche – the terms as well as the (...) practices – are evidence for the close connection among explicitly knowledge-seeking endeavors and crafts and technologies. Physiological experiments, chemical analyses, agricultural or vaccination trials were indebted to applied and practical procedures of making and assaying. What united these different fields was the fact that the problems that had to be solved were very complex yet at the same time of immediate relevance to everyday lives (like diseases or crops) or highly controversial (like vital forces or spontaneous generation). We know that late eighteenth-century and early nineteenth-century practices of inquiry were firmly embedded in applied, technical contexts; this essay shows that methodological notions were anchored in applied, technical contexts as well. (shrink)

Berichte zur Wissenschaftsgeschichte, EarlyView.

The insight that scientific theories are “practice-laden” has animated scholarship in the history of science for nearly three decades. This article examines a style of geographical thought that was, I argue, movement-laden. The thought-style in question has been described as a “vertical consciousness that engulfed science in the early nineteenth century,” and is closely associated with the geographical vision of Alexander von Humboldt (1769–1859). Humboldt’s science spanned nature’s horizontal and vertical axes, from Saxon mines to Andean summits, and from the (...) currents of the ocean to those of the aerial ocean. In probing the origins of Humboldt’s vertical thinking, this article opens up a broader history about the industrial practices and travel cultures that originally animated it. Humboldt’s “global physics” first emerged within a context of vertical travel, up mountains and into mines and caverns. Rhythms of the body—lethal for some, “sublime” for others—became rhythms of the mind. A view of nature as set of vertically complementary spaces rippled through mining culture, Romantic art, and the geographical sciences. To trace the earliest routes of Humboldt’s science is to acknowledge the many actors—some celebrated, most unsung—who took part in the making of a vertical consciousness. (shrink)

Quantum gravity is supposed to be the most fundamental theory, including a quantum theory of the metrical field (spacetime). However, it is not clear how a quantum theory of gravity could account for classical phenomena, including notably measurement outcomes. But all the evidence that we have for a physical theory is based on measurement outcomes. We consider this problem in the framework of canonical quantum gravity, pointing out a dilemma: all the available accounts that admit classical phenomena presuppose entities with (...) a well-defined spatio-temporal localization (“local beables” in John Bell's terms) as primitive. But there seems to be no possibility to include such primitives in canonical quantum gravity. However, if one does not do so, it is not clear how entities that are supposed to be ontologically prior to spacetime could give rise to entities that then are spatio-temporally localized. (shrink)