A "monopoly" is any union, combination, consolidation or affiliation of capital, credit, property, assets, trade, custom, skill, acts or other valuable thing or possession, by or between persons, firms or corporations or associations of persons, firms or corporations, whereby any one of the purposes or objects mentioned in this article is accomplished or sought to be accomplished or whereby any one or more of such purposes are promoted or attempted to be executed or carried out or the several results described herein are reasonably calculated to be produced. A "monopoly" as thus defined includes not merely such combinations by and between two or more persons, firms or corporations acting for themselves, but all aggregations, amalgamations, affiliations, consolidations or incorporations of capital, skill, credit, assets, property, custom, trade or other valuable thing or possession, whether effected by the ordinary methods of partnership, by actual union under the legal form of a corporation, or by the purchase, acquisition or control of shares or certificates of stocks or bonds or other corporate property or franchises and all corporations or partnerships that have been or may be created by the consolidation or amalgamation of the separate capital, stock, bonds, assets, credit, properties, custom, trade or corporate or firm belongings of two or more firms, corporations or companies are especially declared to constitute monopolies within the meaning of this article, if so created or entered into for any one or more of the purposes named in this article.