Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           "minerals constituting rocks"
             1 "Quartz, and Silicates containing alumina, without water"
             2 "Protoxyd-Silicates, not containing water"
             3 "Protoxyd-Silicates containing water"
             4 "Alumina-Silicates containing water"