Graphic representation of the periodic table of chemical elements in the style of a spiral with radii and interrupted short periods. This table was originated by Scottish chemist James Fowler Tocher (1864-1945) in 1910 and classified by chemist Edward G. Mazurs as Type IIB2-3 in his seminal work Types of Graphic Representation of the Periodic System of Chemical Elements (1957). This table appears as Figure 52 on page 125 of Mazurs' 1957 publication.
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Mazurs, Edward G., and Tocher, J. F. (James Fowler). “Periodic Table in Style of Spiral with Radii.” Glass, circa 1910–1957. Edward G. Mazurs Collection of Periodic Systems Images, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/r781wg56f.
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