Alteration or excision of the text, as well as the addition of further text, may introduce fresh subject-matter. For instance, suppose an invention related to a multi-layer laminated panel, and the description included several examples of different layered arrangements, one of these having an outer layer of polyethylene; amendment of this example either to alter the outer layer to polypropylene or to omit this layer altogether would not normally be allowable. In each case, the panel disclosed by the amendment example would be quite different from that originally disclosed and, hence, the amendment would introduce fresh subject-matter and therefore be unallowable.