Periodic table in style of helix with three sizes of revolutions - 9428bbf8e54bb2a8e6ed70cb7a4d4ac3 (page 1)

Top and perspective views of a graphic representation of the periodic table of chemical elements in the style of a helix with three sizes of revolutions for eight representative, ten transitional, and fourteen rare earth elements. This table was originated by Rudolf Vogel in 1918 and classified by chemist Edward G. Mazurs as Type IA3-2 in his seminal work Types of Graphic Representation of the Periodic System of Chemical Elements (1957). This illustration appears as Figure 38 on page 116 of Mazurs' 1957 publication.