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:

Periodic Tables from the year 1868 :

1868	Mendeleev's Handwritten Draft Periodic Table
1868	Meyer's "Lost" Table
1868	Annual Report on the Progress of Chemistry and Related Areas of Other Sciences 1868

Year: 1868

PT id = 193, Type = formulation

Handwritten draft of the first version of Mendeleev's Periodic Table

From of Bill Jensen, Curator of the Oesper Collection at the University of Cincinnati:

Top of Page

Year: 1868

PT id = 439, Type = formulation

Meyer's "Lost" Table of 1868

In his book, The Periodic Table: A Very Short Introduction, Eric Scerri writes how Lothar Meyer produced an expanded periodic system for his1868 textbook which contained 53 elements. Unfortunately, the table was misplaced by the publisher and was not appear until after his death in 1895:

Top of Page

Year: 1868

PT id = 1358, Type = formulation element weight

Annual Report on the Progress of Chemistry and Related Areas of Other Sciences 1868

Jahresbericht über die Fortschritte der Chemie und verwandter Theile anderer Wissenschaften. (Annual Report on the progress of chemistry and related areas of other sciences.) HathiTrust Index scanned reports 1847-1910.

The 1868 table of data is here.

Mark Leach writes:

"Every year the annual report started with a list of the known chemical elements and their atomic weights, however, to the modern eye there were many systermatic errors. For example, oxygen (Sauerstoff) is given as having a weight of 8 which would have caused – due to the importance of oxides – other atomic weights to be out by a factor of 2 or 3. Once a list of correct atomic weights was known, it would be possible to construct a periodic table of the elements.

"In 1858 the Cannazzario letter gave more correct list of atomic weights and corrected the numerous stoichiometric errors that plagued chemistry at the time. Over the years from 1858 to 1873 the entries in the annual report gradually adopted the Cannazzario logic."

Didym Di = 48 and 95 was actually a mixture of rare earth elements.

The missing elements had yet to be discovered.

Al = 13.7 and 27.4

Ba = 68.5 and 137

Be = 4.7 and 7.0

Pb = 103.5 and 207

Cd = 56 and 112

Ca = 20 and 40

Ce = 56 and 92

Cr = 26.1 and 52.2

Fe = 28 and 56

Er = 56.3 and 112.6

Ir = 99 and 198

Co = 29.4 and 58.8

C = 6 and 12

Cu = 31.7 and 63.4

La = 46.8 and 93.6

Mg = 12 and 24

Mn = 27.5 and 55

Mo = 48 and 96

Ni = 29.4 and 58.8

Os = 100 and 200

Pd = 53.3 and 106.6

Pt = 99 and 198

Hg = 100 and 200

Rh = 52 and 104

Si = 14 and 28

O = 8 and 16

S = 16 and 32

Se = 39.7 and 79.4

Sr = 43.8 and 87.6

Te = 64 and 128

Th =57.86 and 115.72

Ti = 25 and 50

Wo = 92 and 184 (note change from W to Wo)

Y = 30.8 and 61.6

Zn = 32.6 and 65.2

Sn = 59 and 118

Zr = 44.8 and 89.6

Thanks to René and Mario Rodriguez for the tip!

Top of Page

What is the Periodic Table Showing?

Periodicity

Queries, Suggestions, Bugs, Errors, Typos...

If you have any:

Queries
Comments
Suggestions
Suggestions for links
Bug, typo or grammatical error reports about this page,

please contact Mark R. Leach, the author, using mark@meta-synthesis.com

This free, open access web book is an ongoing project and your input is appreciated.