By Barry Murnane, Darragh Murnane, Mark Sanders and Noel Snell ‘Great ease and simplicity of action’: Dr Nelson’s Inhaler and the origins of modern inhalation therapy By Tim Boon, Roger Kneebone, Peter Heering, Klaus Staubermann and Yves Winkin A symposium on histories of use and tacit skills By Elizabeth Bruton The life and material culture of Hertha Marks Ayrton (1854-1923): suffragette, physicist, mathematician and inventor By Sarah Baines From 2D to 3D: the story of graphene in objects By Tom Ritchie Ventriloquised voices: the Science Museum and the Hartree Differential Analyser By Alice Cliff and Jenny Rinkinen Visualising electricity demand: use and users of a 3D chart from the 1950s By Frank Trentmann Getting to grips with energy: fuel, materiality and daily life By Harold Wilhite Refrigerating India By Heather Chappells and Hiroki Shin Making Material and Cultural Connections: the fluid meaning of ‘Living Electrically’ in Japan and Canada 1920-1960 By Joanne Entwistle and Don Slater Light as material/lighting as practice: urban lighting and energy