KymographCarl LudwigD. B. KagenaarFulton, John Farquhar (1899-1960)ca. mid-late 19th centuryA brass kymograph housed in a wooden case—seen in the images is a drum that is driven by an internal spring. The case contains twelve sheets of white recording paper, and one smoked sheet with four traces previously recorded on it. The manufacturer, D. B. Kagenaar, has their name stamped in a number of locations throughout the instrument.still image