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 a song when printed and published without music; librettos; descriptions of moving pictures or spectacles; encyclopaedias; catalogues; directories; gazetteers and similar compilations; circulars or folders containing information in the form of reading matter other than mere lists of articles, names and addresses, and literary contributions to periodicals or newspapers."

On the other hand, definitions are made negatively that:

"(5) The term 'book' can not be applied to —

"Blank books for use in business or in carrying out any system of transacting affairs, such as record books, account books, memorandum books, diaries or journals, bank deposit and check books; forms of contracts or leases which do not contain original copyrightable matter; coupons; forms for use in commercial, legal, or financial transactions, which are wholly or partly blank and whose value lies in their usefulness and not in their merit as literary compositions.

"Directions on scales, or dials, or mathematical or other instruments; puzzles; games; rebuses; labels; wrappers; formulae on boxes, bottles, and other receptacles of articles for sale or meant to accompany such articles.

"Advertisements or catalogues which merely set forth the names, prices, and places where articles are for sale.

"Prefaces or other introductory matter to works not themselves entitled to copyright protection, such as blank books.

"Calendars are not capable of registration as such, but if they contain copyrightable reading matter or pictures they may be registered either as 'books' or as ' prints ' according to the nature of the copyrightable matter."