[Natura] - nature
   crystal-kingdom
     elements constituting rocks see [unranked] chemical elements
       01 oxygen Priestley, 1774 - O
       02 silicon Berzelius, 1824 - Si
       03 aluminium Wöhler, 1827 - Al
       04 magnesium Black, 1755 - Mg
       05 calcium Davy, 1808 - Ca
       06 potassium Davy, 1807 - K
       07 sodium Davy, 1807 - Na
       08 iron veter. - Fe
       09 carbon veter. - C
       10 sulphur see sulfur veter.
       11 hydrogen Cavendish, 1766 - H
       12 chlorine Scheele, 1774 - Cl
       13 nitrogen Rutherford, 1772 - N