Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Mineræ - minerals
           Order Salia - salts
             1 Genus Nitrum
             2 Genus Muria
             3 Genus Alumen
             4 Genus Vitriolum