out books and readers together. One thinks at once of a simple and obvious little machine by which such a roll could have been quickly wound to and fro for reference, but nothing of the sort seems to have been used. Every time a roll was read it was handled by two perspiring hands. It was to minimize the waste of time and trouble that Callimachus broke up long works, such as the History of Herodotus, into "books" or volumes, as we should call them, each upon a separate roll. The library of Alexandria drew a far vaster crowd of students than the teachers of the Museum. The lodging and catering for these visitors from all parts of the world became a considerable business interest for the Alexandrian population.

It is curious to note how slowly the mechanism of the intellectual life improves. Contrast the ordinary library facilities of a middle-class English home, such as the present writer is now working in, with the inconveniences and deficiencies of the equipment of an Alexandrian writer, and