what does the phrase 'tabulation of scientist' mean?

Question

what is the tabulation of Dimitri Mendeleev?

Answer 1

The phrase indicates the methods,calculations,observations inferences and predictions made by the scientist concern like Dimitri Mendeleev .
The Scientist prepare their hypothesis based on compilation of a number of such tabulations.

Answer 2

In the case of Mendeleev it means his written work. Tabulate means to make a record of your work (as in a summary).