Scope and Contents Small box labelled ‘Gelatine-Emulsionsplatten, J Gädicke, Berlin’, containing six glass slides relating to Hermann von Helmholtz [1821-94, German physician and physicist], being images of him and his scientific equipment. [Presumed to have been used to illustrate a Cambridge Philosophical Society lecture or article?]The slides are numbered 1-6 and the box contains a handwritten list:1. Helmholtz 27 years old;2. Helmholtz 73 years old [from a pastel drawing by Leubach,...