ii. Every subsequent edition of a book, unless

(_a_) it contains no alterations or additions.

Within one month after demand.

Provided that within twelve months after publication demand has been made to the publishers under the hand of the officer of the Company of Stationers or other person authorised thereto by the respective libraries.

The officer at Stationers' Hall and librarians of the several libraries are required to give a receipt in writing when a copy of a book is delivered to them.

The clauses as to delivery of copies are to be considered as being strictly penal. In _The British Museum_ v. _Payne_,[299] under the similar provisions in 54 Geo. III. c. 156, it was held that when a book was published in parts, a single part was not demandable. The Court refused to consider the question when, if ever, the complete book would be demandable.

It will be noticed that neither the copyright nor the right to sue is affected by non-delivery of these copies. The only consequence of omission to do so is a penalty on the publisher.

The right of the various bodies to delivery of a copy applies to all books published within the United Kingdom and not only to those entered at Stationers' Hall.[300]

SECTION VII.--DURATION OF PROTECTION.

Protection dates from first publication.

_Generally._--The period of protection is for the natural life of the author and for seven years after his death, or for forty-two years from the date of publication, whichever period shall be longer.[301]

_Posthumous Works_ are protected for forty-two years from the date of publication.[302]

_Encyclopædias_ are protected for the life of the proprietor and seven years (by 5 & 6 Vict. c. 45, sec. 18, the proprietor of a collective work enjoys the same rights as if he were the actual author thereof), or for forty-two years from the date of publication, whichever period shall be the longer.[303]

_Reviews_, _Magazines_, _and other periodical works of a like nature_[304] have two separate copyrights, viz.: