By Nicola Froggatt When is a shield not a shield? Interpreting Indigenous versatility in an East End match factory By Doug Millard Black Arrow R4: the object behind the screen By Elizabeth Bruton, Jeremy McCarthy and Dermot Turing Zygalski sheets: Polish codebreaking and the role of reconstruction in the Top Secret exhibition at the Science Museum By Farrah Lawrence-Mackey ‘Iron lung’ as metaphor By David Bryden Science and the City: Valentine Gottlieb, immigrant engineer of Lambeth: his trade card of c. 1810 unpacked By Gemma Almond Why the anonymous and everyday objects are important: using the Science Museum’s collections to re-write the history of vision aids By Daniel Belteki A model instrument: the mand the unmaking of a modelaking of the Airy Transit Circle By Tom Everett Writing sound with a human ear: reconstructing Bell and Blake’s 1874 ear phonautograph By Julie Ackroyd The provenance and context of the Giustiniani Medicine Chest By Tessa Murdoch and Jonathan Betts A royal gift? Mrs Strangways Horner’s small silver clock, 1740
