Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "Lapideum Regnum" nom. inval. - mineral kingdom
           Class "Minerae" - minerals
             Order "Sulphura"
               1 Genus "Electrum"
               2 Genus "Bitumen"
               3 Genus "Pyrites"
               4 Genus "Arsenicum"