Among the many engravings of landscapes, buildings, portraits and other illustrations produced by the seventeenth-century artist Wenceslaus Hollar, there are a small number of images of contemporary men of science. Of particular interest is the portrait of the instrument-maker Elias Allen, both because portraits of men of his social status were extremely uncommon at this time, and also because the cluttered mass of instruments shown in the image presents a picture wholly unlike other portraits of the period. The first part of this paper explores the position of portraiture as inherently linked to nobility, and seeks to present an explanation as to why the original oil painting of Allen (made by Hendrik van der Borcht and no longer extant) might have been made. The second part looks at the image itself, and discusses possible reasons for Hollar's production of the engraving some twenty years after the original.

In 1915, after acquiring first-hand knowledge of the new free radical chemistry at the Swiss Federal Institute of Technology (ETH) in Zurich, Antonio García Banús (1888–1955) became professor of organic chemistry at the University of Barcelona and created his own research group, which was to last from 1915 until 1936. He was a gifted teacher and a prolific writer who attempted to introduce international scientific standards into his local environment. This paper analyses the bridges that Banús built between the experimental culture of organic chemistry at the ETH and the University of Barcelona. It presents a case study which aims to provide new historical data for the general analysis of groups who conducted their work in the European periphery.

Francesco Algarotti's Newtonianism for Ladies (1737), a series of lively dialogues on optics, was a landmark in the popularization of Newtonian philosophy. In this essay I shall explore Algarotti's sociocultural world, his aims and ambitions, and the meaning he attached to his own work. In particular I shall focus on Algarotti's self-promotional strategies, his deployment of gendered images and his use of popular philosophy within the broader cultural and experimental campaign for the success of Newtonianism. Finally, I shall suggest a radical reading of the dialogues, reconstructing the process that brought them to their religious condemnation. What did Newtonianism mean to Algarotti? In opposition to mainstream apologetic interpretations, he seems to have framed the new experimental methodology in a sensationalistic epistemology derived mainly from Locke, pointing at a series of subversive religious and political implications. Due to the intervention of religious authorities Algarotti's radical Newtonianism became gradually less visible in subsequent editions and translations. It is only through the study of the first – clandestine – edition of the dialogues that one can begin reconstructing the meaning of Algarotti's experiments (real and fictional) and his cultural battle for a regenerated Europe.