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  1.  54
    Charles Janet: Unrecognized Genius of the Periodic System. [REVIEW]Philip J. Stewart - 2010 - Foundations of Chemistry 12 (1):5-15.
    Janet is known almost exclusively for his left-step periodic table (LSPT). A study of his writings shows him to have been a highly creative thinker and a brilliant draftsman. His approach was primarily arithmetic-geometric, but it led him to anticipate the discovery of deuterium, helium-3, transuranian elements, antimatter and energy from nuclear fusion. He recognized the (n + ℓ) rule well before Madelung and correctly placed the actinides. His controversial treatment of helium at the head of the alkaline earth elements (...)
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    Tetrahedral and Spherical Representations of the Periodic System.Philip J. Stewart - forthcoming - Foundations of Chemistry:1-10.
    The s, p, d and f blocks of the elements, as delimited by Charles Janet in 1928, can be represented as parallel slices of a regular tetrahedron. They also fit neatly on to the surface of a sphere. The reasons for this are discussed and the possible objections examined. An attempt is made to see whether there are philosophical implications of this unexpected geometrical regularity. A new tetrahedral design in transparent plastic is presented.
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    A Century on From Dmitrii Mendeleev: Tables and Spirals, Noble Gases and Nobel Prizes. [REVIEW]Philip J. Stewart - 2007 - Foundations of Chemistry 9 (3):235-245.
    Mendeleev’s failure to represent the periodic system as a continuum may have hidden from him the space for the noble gases. A spiral format might have revealed the significance of the wide gaps in atomic mass between his rows. Tables overemphasize the division of the sequence into ‘periods’ and blocks. Not only do spirals express the continuity; in addition they are more attractive visually. They also facilitate a new placing for hydrogen and the introduction of an ‘element of atomic number (...)
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