X-rays simply explained : a handbook on Röntgen rays in theory and practice
A 1904 London handbook by Robert Pickersgill Howgrave-Graham, published by Percival Marshall for amateur experimenters and technicians learning to build and use Röntgen-ray apparatus. Halftone photographs of wooden-framed stands, coils and instrument cases sit beside line diagrams of vacuum tubes with radiating dashed rays and lettered wiring circuits, useful for schematic ray bursts, labelled component keys and early radiographs of tools.
