(Reduced; actual size, 7-1/2 x 12-1/2 cm.) 973.2 Old times in the colonies C65 _Coffin_, C.C.] As the use of the library for reference work increases, the question will often be asked, has it any books on a certain subject?
Add, therefore, to your author- and title-list a subject-list.

Make this by writing a card for each book with the subject of which it treats the first word upon it.

Arrange this also in the same alphabetical series with the other two.

In some cases the book's title and its subject will be identical; for example, Geology, by Tompkins, or Washington's boyhood, by Jones.

For such books one card answers for title and subject.