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 writers may be added in the heading when they are part of the usual designation of the writer."

This is not expressly stated in other systems of rules, and in others is forbidden. The British Museum recognises nothing below the dignity of a Dean as indispensable, and withheld an appellation from Canon Farrar till he reached that eminence. The frequent changes in military, naval, and ecclesiastical titles make the Library Association rule somewhat difficult in practice.

BRESLAU CATALOGUE (DR. DZIATZKO)

Among Continental systems of author-catalogues there is one which, by its scientific completeness and the eminence of its contriver (now librarian of the University of Gottingen) deserves careful attention — that in use at the Royal Library at Breslau. The features which distinguish it from the British Museum "Ninety-one Rules" have partly been adopted there as additional to those rules, and partly are due to the fact that the Breslau catalogue is a card-catalogue, in which much shifting is possible without reprinting. The Breslau system, too, is characterised by a fine disregard of unimportant people, in strong contrast with the British Museum catalogue, which, for instance, contains cross-references for all the successive editors of the obscurest