I re-examine the raw data of the measurements of the half-life of 210Po from the Romanian physicist Ştefania Mărăcineanu’s doctoral thesis, performed at the Institut du Radium, 1921–1923, under the supervision of Marie Curie. The half-life values reported in the thesis show relatively large divergences and a possible dependence on the (metallic) support on which the Po source was deposited. These findings

We reconstruct Enrico Fermi’s remarkable discovery of neutron-induced radioactivity in March 1934 with a focus on the experimental apparatus he used, such as the original neutron sources preserved in Italy and abroad. Special attention is paid to the role of the Radium Office of the Institute of Public Health in Rome in providing to Fermi the “radium emanation” (Radon-222) used to make his radon-beryllium

The paper is focused on the two most outstanding figures among the Jesuit missionaries in seventeenth-century China: Johann Adam Schall von Bell and Ferdinand Verbiest. Schall aimed to introduce the telescope into Chinese astronomy, which was traditionally based on naked-eye observation and calculation. With the advent of the Qing dynasty, he became head of the Mathematical Board and director of the

The concept of “fact” has a history. Over the past centuries, physicists have appropriated it in various ways. In this article, we compare Ernst Mach and Albert Einstein’s interpretations of the concept. Mach, like most nineteenth-century German physicists, contrasted fact and theory. He understood facts as real and complex combinations of natural events. Theories, in turn, only served to order and

Western missionaries played an important role as go-betweens, promoting communication and interaction between Europe and China in science, culture, and religion. In 1644, the Qing government appointed the Germany Jesuit missionary Johann Adam Schall von Bell head of the Bureau of Astronomy, placing him in charge of reforming the Chinese calendar. In the traditional calendar, in addition to dates based

The American physicist John Wheeler once told his colleague Richard Feynman that, in case of war, “it’s better to forget physics and tell the admirals and generals how to do tactical and strategic this-and-that.” This article explores the history of this-and-that distinctions between tactical and strategic nuclear weapons in the early Cold War. The idea of tactical nuclear weapons was intertwined with

As the History of Science Society, which is based in America, holds its annual meeting in Utrecht, one of the key academic centers on the European continent, one may surmise that the field has returned home. Yet, this hardly reflects how today’s world of scholarship is constituted: in the historiography of science, “provincializing Europe” has become an important theme, while the field itself, as is

The article ‘Einstein’s Gyros’ written by József Illy was originally published electronically

Einstein’s life-long effort to develop a theory that unifies gravitation and electromagnetism was not a purely theoretical enterprise. The technical environment of a gyrocompass factory triggered his search for a novel connection between the rotation of an electrically uncharged body and its magnetic field. The dimensional equality of the electric unit charge and the mass of a body multiplied by the

The concept of constants of nature originated in the late-nineteenth century and has since then increasingly occupied the minds of physicists. But are the constants truly constant? Inspired by Paul Dirac’s suggestion that the gravitational constant varies slowly in time, the question was addressed not only by physicists but also by astronomers, geologists, and paleontologists. Pascual Jordan in Germany

In 2002 readers of Physics World voted Young's double-slit experiment with single electrons as "the most beautiful experiment in physics" of all time. Pier Giorgio Merli, Gian Franco Missiroli, and Giulio Pozzi carried out this experiment in a collaboration between the Italian Research Council and the University of Bologna almost three decades earlier. I examine their experiment, place it in historical

In the original publication of this article, the author noticed some minor errors.

Recent historiographic results in Galilean studies disclose the use of proportions, graphical representation of the kinematic variables (distance, time, speed), and the medieval double distance rule in Galileo’s reasoning; these have been characterized as Galileo’s “tools for thinking.” We assess the import of these “tools” in Galileo’s reasoning leading to the laws of fall (\(v^{2} \propto D\) and

Karl Przibram is one of the pioneers of early solid state physics in the field of the interdependence of coloration effects and luminescence in solids (crystals, minerals) induced by radiation. In 1921 Przibram discovered the effect of radio-photoluminescence, the light-stimulated phosphorescence in activated crystals induced by gamma rays. In 1926 Przibram was the first to use the term, Farbzentrum

Trained at University of Liverpool in both theoretical and experimental physics, William Band accepted in 1929 an appointment at Christian Yenching University in Beijing, China, where he established his career through the 1930s, heading the physics department and nurturing dozens of distinguished Chinese researchers in its MSc program. Despite the Japanese occupation of Beijing in summer 1937, Band

This is the third in a three-part article describing the development of the experimental program at the Thomas Jefferson National Accelerator Facility, from the first dreams of incisive electromagnetic probes into the structure of the nucleus through the era in which equipment was designed and constructed and a program crafted so that the long-desired experiments could begin. These developments unfolded

Against the background of the current drive toward diversity in modern scientific communities, this paper explores how a scientific practice might become more diverse by the inclusion of peripheral members. To demonstrate how peripheral members gain contributory expertise in the sciences in the absence of mentors and a readymade community, I present a case study of the Indian physicist C. V. Raman

Since the late-nineteenth century, scientists have been labeled with disciplinary fields and scientific achievements have been identified largely with heroic individuals. Reward systems such as the highly visible Nobel Prizes have reinforced such a view of science. This paper examines long-term trends in Nobel Physics awards since 1901 and asks whether the awards have registered the increasing specialization

In this paper, we analyze in a quantitative manner the changing position of Physical Review in the global field of physics, compared to other important physics journals, since the beginning of the twentieth century. This approach complements existing intellectual and institutional accounts of Physical Review’s historical evolution and offers a dynamical portrait of the global landscape of physics journals