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Roman numerals for references, thus :-AnuaZeiz, 221, 92, instead of ccxxi, 92. 5. If an abstractor is acquainted with papers previously published by other authors containing statements either practically identical with, or opposed to, those in the paper abstracted, and to which no reference is made, he should notice their agreement or contradiction in a foot-note. 6. As a rule, details of methods of preparation or analysis, or generally speaking of work, may be omitted, unless such details aredoi:10.1039/ca89058ba001 fatcat:25c3zofttrb7ronqrpmvr4ntwm