Appearing on behalf of the appellant, Mr. Ashok Sen has urged that the author (composer) of a literary or musical work has copyright which includes inter alia the exclusive right (a) to perform the work in public 'and (b) to make any cinematograph film or a record in respect of the work; that copyright in a literary or musical work is infringed by any person if without a licence granted to him by the owner of the copyright, he makes a cinematograph film in respect of the work or performs the work in public by exhibiting the cinematograph film; that if a person desires to exhibit in public a cinematograph film containing a musical work, he has to take the permission not only of the owner of the copyright in the cinematograph film but also the permission of the owner of the copyright in the literary or musical work which is incorporated in the cinematograph film, as according to section 1. 3 (4) of the Act, the copyright in a cinematograph film or a record does not affect the separate copyright in any work i.n respect of which or a substantial part of which, the film, or as the case may be, the record is made; that the provisions of section 17(b) of the Act have no application to a literary or musical work or the separate copyright therein and do not take away the copyright in a literary or musical work em bodied in a cinematograph film; that the only modes in which the author of a literary or musical work ceases to be the owner of copyright m the work are (a) by assignment, '(b) by relinquishment and (c) by the composer composing the work in 'the course of his employment under a contract of service with an employer in which case, the employer becomes the owner of the copyright in the musical work; that in the case of an assignment of copyright in future work and the employ ment of the author to produce a work under a contract of service, the question of priorities will be decided ac cording to the principle "where equities are equal, the first in time shall prevail".