Röntgentechniek : therapeutische beteekenis der "X" -stralen en der stoomen van hooge fréquentie
A Dutch technical manual on X-ray technique and high-frequency current therapy by W. C. van de Volkere, published in Amsterdam by Stemler's Boekhandel in 1904 for physicians and radiographers. The 72 numbered figures are halftones and line cuts of laboratory apparatus—influence machines with toothed discs, induction coils, gas-filled tubes, switchboards with dials, and clamp stands on weighted bases—usable as schematic equipment silhouettes, dial and terminal details, and captioned figure plates.
