By Graeme Gooday, Alexander King and Nela Spurna 1876 and All That: the ‘Special Loan Collection of Scientific Apparatus’ as a case study in crowd-sourced international public science By Rebekah Higgitt Revealing observatory networks through object stories: Introduction By Ileana Chinnici, Louise E Devoy and Fernando B Figueiredo Revealing observatory networks through object stories: Object itineraries By Emily Akkermans, Kelley Wilder and Samantha Thompson Revealing observatory networks through object stories: Instrumental networks By Alison Hess Book review: Curious Devices and Mighty Machines: Exploring Science Museums by Samuel J M M Alberti (Reaktion Books, 2022) By John Stack and Jamie Unwin The potential and pitfalls of machine learning in the Congruence Engine context By Asa Calow The future: reflections on emerging machine-learning methods for digital heritage By Simon Popple, Stefania Zardini Lacedelli, Arran J Rees, Stuart Prior and Maggie Smith Collaborative conversation as a method for exploring multiple perspectives on 'community' and forms of knowledge in the Congruence Engine By Jon Agar History of communications and the Congruence Engine: early thoughts and possibilities By Paul Craddock Connecting with industrial heritage collections using video production methods