The first article of the Mexico convention formed the signatory states into "a Union for the purpose of recognizing and protecting the rights of literary and artistic property," which was defined (art. 2) as including "books, manuscripts, pamphlets of all kinds, no matter what subject they may treat of and what may be the number of their pages; dramatic or melodramatic works; choral music and musical compositions, with or without words, designs, drawings, paintings, sculpture, engravings, photographic works; astronomical and geographical globes; plans, sketches and plastic works relating to geography or geology, topography or architecture, or any other science; and finally, every production in the literary and artistic field, which may be published by any method of impression or reproduction." Copyright was defined (art. 3) as the exclusive right to dispose of the work, to publish, to sell and translate it or authorize translation, and to reproduce it in any manner, in whole or in part. {Sidenote: Indispensable condition} The "indispensable" condition of copyright was (art. 4) a petition from the author or his representative to the proper office, presumably of his own government, with two deposit copies, and if he desired recognition in other countries, with additional copies for each country designated, which copies were to be forwarded to the respective governments accompanied by a copy of the certificate of registration. Authors were secured (art. 5) in each country the rights granted by their own government within the term of protection of the country of origin--in works published in installments, the term of copyright to date from the publication of each part. The country of origin was defined (art. 6) as that of first publication, or in case of simultaneous publication, that having the shortest period of protection. The name or acknowledged pseudonym on a work (art. 9) was accepted as indication of the author except on proof to the contrary. {Sidenote: Special provisions} Authorized translations or those of non-protected works (art. 7) could be copyrighted as original works, but not to the exclusion of other versions of the latter. Newspaper articles might be reproduced (art. 8) on acknowledgment of source and author's name, if given; addresses before legislative assemblies, court or public meetings (art. 10) might be freely reproduced, and extracts made (art. 11) in publications devoted to public instruction or chrestomathy.