The present work is a codification Of the typographical rules employed by the University Of Chicago in connection with its official printing and publications issued through the University Press. Having its genesis, nearly two decades ago, in a single sheet of fundamentals, jotted down by the first proofreader at Odd moments for his own guidance; added to from year to year, as oppor tunity Ofiered or new necessities arose; revised and re-revised as the scope Of the work, and, it is hoped, the wisdom Of the workers, increased — it emerges in its present form as the embodiment Of traditions, the crystallization Of usages, the blended product Of the re?ections Of many minds.