Note 23 — THE COPYRIGHT

The notice of copyright must consist either of the word "Copyright" or the abbreviation "Copr." accompanied by the name of the copyright proprietor, and if the work be a printed literary, musical, or dramatic work, the notice shall include also the year in which the copyright was secured by publication. In case, however, of copies of (f) Maps; (g) Works of art; models or designs for works of art; (h) Reproductions of a work of art; (i) Drawings or plastic works of a scientific or technical character; (j) Photographs; (k) Prints and pictorial illustrations, the notice may consist of the letter C inclosed within a circle, thus: ©, accompanied by the initials, monogram, mark or symbol of the copyright proprietor: Provided, that on some accessible portion of such copies or of the margin, back, permanent base or pedestal, or of the substance on which such copies shall be mounted, his name shall appear.

The notice of copyright must be applied in the case of a book or other printed publication, upon its title-page or the page immediately following [the back of the title-page], or if a periodical either upon the title-page or upon the first page of text of each separate number or under the title heading, or if a musical work either upon its title-page or the first page of music; but one notice of copyright in each volume or in each number of a newspaper or periodical published is sufficient.