Drawings relating to the construction of the first UK high voltage transmission electron microscope at the Cavendish Laboratory, University of Cambridge.

The Portsmouth Collection is the principal collection of Isaac Newton's scientific and mathematical papers, including early drafts of the Principia, and his correspondence with Oldenburg, Halley Flamsteed and many of the other most prominent scientists of his day.

Papers by Oatley, including "The Early History of the Scanning Electron Microscope" and copies and reprints of papers by others, including Manfred von Ardenne, Dennis McMullan, K C A Smith, T E Everhart and R F M Thornley. One file of articles and papers by Frisch, Cosslett & Thomas, Pawley, Comins & Hengstberger & Thirlwall, Autrata, with annotations and comments by Oatley.

The collection mainly consists of publications, correspondence, pocket diaries and lab books. There are also some lantern slides from Glauert's research.

Correspondence and papers concerning the development of the Electron Microscope