The notice of copyright must be printed (sec. 18) on each copy, as in the case of a book in the form "Copyright" or the abbreviation "Copr.," "accompanied by the name of the copyright proprietor" and "the year in which the copyright was secured by publication." In the case of a published dramatic work the notice must be placed, as in the case of a book, upon the title-page or the page immediately following, but in the case of a published musical work the law provides that the notice "shall be applied ... either upon its title-page or the first page of music," and this specification makes the copyright notice of doubtful validity if applied in a musical work on the page following the title-page, unless this is the first page of music. {Sidenote: Dramatico-musical works protected from mechanical reproduction} The classification of dramatico-musical compositions under subsection (d) as dramatic works and not under subsection (e) as musical compositions, defines an opera and possibly an oratorio or cantata as a dramatic rather than a musical composition. As the dramatic author is given (sec. 1, d) the comprehensive rights over reproduction "in any manner or by any method whatsoever" while the musical author is limited (sec. 1, e) in respect to mechanical reproductions, it would seem to follow that the author of an opera may retain absolute control over mechanical reproduction, as the author of a non-musical drama retains absolute control over phonographic or other reproduction of his drama. This would seem to confine the requirements that the author of a musical composition permitting mechanical reproduction should license any manufacturer, to musical compositions which are not dramatic, _i. e._, to instrumental compositions or to songs and other vocal music not associated with drama. As an overture to an opera is an integral part of the dramatico-musical composition, it would even seem that an overture which is part of an opera, or possibly an orchestral introduction or interlude in an oratorio or cantata, would not be subject to the mandatory license provided as to musical compositions. But this question has not yet come before the courts. {Sidenote: Dramatic and musical works excepted from manufacturing provisions}