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