An antecedent to the continuous strip chart. A cylinder was wrapped with paper that had been covered with soot produced by a yellow flame. The paper-covered cylinder was rotated against a stylus at a selected rate to produce a graphic recording of physiologic and other events. The recording was preserved by a coat of shellac varnish. The accompanying image is taken from page 153 in Marey’s 1885 book Méthode Graphique Dans Les Sciences Expérimentales Et Principalement En Physiologie Et En Médecine.
