The INTERNET Database of Periodic TablesThere are hundreds 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.
1831 Daubeny's Teaching Display Board of Atomic Weights The Museum of the History of Science, Oxford, has a display of Charles Daubeny's teaching materials from 1831, including a black painted wooden board with "SYMBOLS OF SIMPLE BODIES": symbols, atomic weights and names of elements in two columns, and a small pile of cubes with element symbol. Note that some of the numbers seem very strange to our eyes: carbon is given as 6 (rather than 12) and oxygen 8 (not 16), while others correspond with modern values remarkably well, chlorine is given as 36 rather than 35.5. Daubeny's weights (along with the modern mass) are given:
Check out the virtual tour of the museum, here. The display of Daubeny's teaching materials can be found in the basement, here.
© Mark R. Leach 1999 Queries, Suggestions, Bugs, Errors, Typos... If you have any:
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