Les rayons cathodiques
A French scientific monograph on cathode rays by physicist Paul Villard, published in Paris by C. Naud in 1900 for physicists and medical readers studying the new X-ray tubes. The figures are spare line diagrams of discharge tubes, electrodes and curving ray paths, lettered A, E, N, with hatched shading — useful for schematic apparatus motifs and labelled technical line work.
