Brazilian Version of The Hubbard Periodic Chart Of The Atoms
A Brazilian Version of the American classic Henry Hubbard Periodic Chart Of The Atoms from a lecture theater in Rio, rediscovered by Martyn Poliakoff of PeriodicVideos.com and The University of Nottingham. From the early 1930s:
The current Sargent Welch version of the Henry Hubbard Periodic Table:
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© Mark R. Leach 1999-
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