The 1790 Fête de la fédération in the early French Revolution evoked the memory of the taking of the Bastille while tamping down on the simmering social forces that had erupted on 14 July 1789. How to do both? As an official architect put it, through the festival, ‘the sentiment of each becomes the sentiment of all by a kind of electrification, against which even the most perverse men cannot defend themselves’. This paper argues that a new language of revolutionary electricity came into being with the French Revolution. It argues that revolutionaries drew upon concepts of medical electricity developed in the 1780s to analogize the literal electricity of the ether to the revolutionary electricity of collective political sentiment. Though historians have associated electricity with radical politics, this paper argues that in the hands of bureaucrats and festival planners, electricity entered revolutionary discourse as a powerful mechanism for exercising authority and control over an unruly revolutionary public.

In the 1870s, microscopy societies began to proliferate in the United States. Most of these societies attracted microscopists from surrounding cities, but the American Postal Microscopical Club, modelled on the British Postal Microscopical Society, used the postal system to connect microscopists scattered across the country. Club members exchanged microscope slides and notes following a chain-letter system. The main objective of the club was to teach its members how to make permanent slides. Preparation and mounting methods required technical skill, which was, as even club members had to admit, difficult to learn without personal instruction. Yet members developed ways to share craft knowledge through the post. Drawing on the private notes of a member and published reports on the slides circulated, this paper challenges the widespread assumption that the generation of craft knowledge depended on the co-location of artisans. It argues that microscopists’ knowledge of preparation methods was intertwined with their skill in building and navigating information infrastructures, and that by tracing these infrastructures we gain a better understanding of how craft knowledge travelled in the late nineteenth century.

This article provides a transnational analysis of the campaigns for the organization of expeditions to the central Arctic region by the American explorer Elisha Kent Kane and the Prussian cartographer August Petermann between 1851 and 1853. By adopting a comparative approach, this study focuses on three interventions in the history of Arctic science and exploration: the construction of scientific expertise surrounding the relationship between the ‘armchair’ and the field, the role of transnational networks, and the significance of maps as travelling epistemic objects in the production of knowledge about the Arctic regions. In bringing both campaigns in conversation with each other, this article demonstrates that the histories of Kane's and Petermann's campaigns did not constitute isolated episodes but form part of a transnational nexus of imperial science and Arctic exploration in the nineteenth century. Moreover, based on research in libraries and archives in the United States, Germany and England, this study reconnects otherwise siloed collections and contributes new findings on the interpersonal networks of science and exploration. Finally, this article illustrates the importance of adopting comparative transnational approaches for understanding the fluid and reciprocal nature of Arctic science throughout the transatlantic world.

Across Tibet during the 1940s, young Han Chinese weather observers became stranded at their weather stations, where they faced illness, poverty and isolation as they pleaded with their superiors for relief. Building on the premise that China exercised ‘imperial nationalism’ in Tibet, and in light of scholarship that emphasizes the desirous ‘gaze’ of imperial observers toward the frontier, this essay considers how the meteorological archive might disrupt our understanding of the relationship between observation and empire. Meteorology presented a new way of viewing the landscape that deliberately disregarded the embodied experience of the observer in favour of instrument-mediated readings. The process produced a bifurcated archive, in which stations disseminated quantitative weather charts as a matter of public interest while privately recording the embodied and often miserable experiences of observational staff on the frontier. Unpublished letters between observers and supervisors offer a rare glimpse into the frontier as experienced by reluctant or unwilling agents of the state.