Internet Database of Periodic Tables
There are thousands of periodic tables in web space, but there is only one comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Dr Mark R Leach.
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Janet's "Lemniscate" Formulation
From in The Helicoidal Classification of the Elements, Chemical News vol. 138, 21 June 1929, Fig. XI, p. 392:
Philip Stewart points out that this formulation is an 'end on' view of the Janet Cylinder or Three-Dimensional Spiral-Tube System formulation, and the term "lemniscate" comes from Mazurs.
© Mark R. Leach 1999-
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