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What is the Periodic Table Showing? Periodicity

The INTERNET Database of Periodic Tables

There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Mark R. Leach Ph.D. The database holds information on periodic tables, the discovery of the elements, the elucidation of atomic weights and the discovery of atomic structure (and much, much more).

   Use the drop menus or search box (below) to Select or Search the 1400 entries in the database: 

  Or, Search by Text String:       
Year:  1915 PT id = 1233, Type = formulation 3D

Ramsay's The Elements Arranged in The Periodic System (with movable flap)

From pages 220 & 221 of William Ramsay's book The Gases of The Atmosphere, McMillan (1915) comes a periodic table with a fold (or flap) that can be moved from page 220 to 221:

This periodic table is available as a Project Gutenberg ebook. The HTML version gives this dual representation:

Thanks to John Marks for the tip!

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –

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