Graphic representation of the periodic table of chemical elements in the style of a spiral with interrupted short and medium periods. This table was originated by French engineer, inventor, and biologist Charles Janet (1849-1932) in 1928 and classified by chemist Edward G. Mazurs as Type IIIB3-3 in his seminal work Types of Graphic Representation of the Periodic System of Chemical Elements (1957). A version of this illustration appears as Figure 74 on page 141 of Mazurs' 1957 publication.
Mazurs, Edward G., and Charles Janet. “Periodic Table in Style of Spiral with Interrupted Short and Medium Periods.” Glass, circa 1928–1957. Edward G. Mazurs Collection of Periodic Systems Images, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/st74cq96s.