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300 record books, indexes, etc. He is authorized to affix the seal of the Copyright Office provided for by law, and is happily relieved by the new code from the necessity of formal signature of certificates, etc., which under the old law wasted precious and difficult hours in small routine work, the affixing of the seal being the sufficient and sensible substitute for the personal signature. An assistant register of copy- rights at a salary of $3000 was provided for in the new act, also to be appointed by the Librarian of Congress, with authority during the absence of the Register to attach the seal and perform other neces- sary functions. Catalogues The law directs that the Register of Copyrights and indexes "shall print at periodic intervals a catalogue of the titles of articles . . . together with suitable indexes, and at stated intervals . . . complete and indexed catalogues for each class of copyright entries," which "shall be admitted in any court as prima facie evi- dence," shall be promptly distributed to collectors of customs and postmasters of all exchange offices and shall be furnished to others at a price not exceeding $5 per annum for the complete catalogue or $1 for the catalogues issued during the year for any one class.

The practice of the Copyright Office is to make for each copyrighted book an index card, in conformity with the printed catalogue card of the Library of Con- gress, and to utilize the linotype slugs set for this pur- pose, with some modification, as the basis for the "Catalogue of copyright entries" for books. The catalogue for books proper. Part 1, Group i, is printed weekly with an annual index, which, together with Part L Group 2, issued monthly with more condensed entries, — containing the titles for all other material registered under the legal designation "book," not found in Group i, i. e., local directories and other an-