Application for books to be used in the Main Reading Room should be made in the Public Catalogue Room. The applicant writes his request upon the slip furnished for the purpose, and files it at the desk in this room. A numbered ticket is handed him, which he takes into the Main Reading Room, going to the right if the ticket number is odd; to the left if the number is even. He then waits at the indicator at the western end of the delivery desk until the number on his ticket appears. This means that his books are ready for him at the desk. If, however, he prefers first to select a seat in the Main Reading Room, he should write the number of that seat on his application, and his books will be left at that seat, if he is there to receive them.

The Main Reading Room, in the rear, extends nearly the entire length of the building. It has a floor area of half an acre, and is divided in the middle by a booth from which books are delivered. There are seats for 768 readers. Mr. A. C. David, in the article previously quoted from the Architectural Record, says:

"The Main Reading Room is one of the most spacious rooms in the world—beautifully proportioned, lighted by a series of windows on both the long sides of the room, and entirely accessible to the stacks. To have obtained a room of these dimensions, so excellently adapted to its purpose in every respect, was a great triumph for the architects."

The shelves along the walls contain a collection of about 25,000 volumes. These books are not only the usual works of reference,—dictionaries, encyclopaedias, and the like, but they also include a good working library of general literature,—philosophy, religion, science, history, law, biography, standard novels, poetry, and the drama. These books are for the free use of anyone in this room, without the need of making any application. The reader has only to select the book he wishes, and to take it to a table, where he may consult it. When he has finished he should leave it on the table, rather than attempt to return it to its place, since a misplaced book is temporarily lost.

DOOR OF EXHIBITION ROOM

The Library's Books. It should be kept in mind that the books of the Reference Department are all in the Central Building, and must all be used in that building. The great body of them are in the stack beneath the Main Reading Room. In addition, there are the books in the Main Reading Room itself, and in the special reading rooms in other parts of the building. Books and pamphlets number, altogether, about one million and a quarter.