As was stated in the introduction, no radical changes from the second edition were made except in response to what seemed to be a very general demand. There were few dissenting votes to the proposition to abandon the headings Arts, Fine, and Arts, Useful. The majority in favor of Government instead of Political science was less decisive, but still a majority, and the confession heard more than once, "I never can remember the difference between political science and political economy," was a straw that helped to turn the scale. Trade union is no longer a comprehensive term when organizations of teachers and of others outside the trades must be included. The phrase Domestic economy is being superseded in recent books by Home economics or by Domestic science. It is impossible to mention the changes in detail or to give the reasons for each, but no changes were made without careful consideration. Just how far it is advisable to alter existing catalogs in order to conform to the new headings is a problem that each cataloger must decide for herself. If in your opinion the heading already in use is better than the new one suggested, by all means retain it. If, while admitting a slight advantage in the new heading, you think that the gain is not sufficient to justify the labor of changing, it is much easier to alter your copy of the Subject headings than to erase or re-write catalog cards. But if you are convinced that the new heading is one that will be more readily found by the users of your library, and by the desk attendants who have not catalog training, then make the change, even at the expense of considerable time and labor. And by all means consult the attendants in the circulating and reference departments if in doubt as to the advisability of making a change. They know how books are called for. They know how they themselves look for them; and "see" references are irritating when there is a line of impatient borrowers reaching from the request window to the door. Such changes as have already been made in the catalog of the Buffalo public library have met with general approval from the loan desk. Recitations and readings; Grammar, English; Spelling, English; Corn instead of Maize; Humor instead of Wit and humor; the transfer of the subheading Best books from Bibliography to Books and reading; and the removal of Immigration from under country, have received especial approbation. The necessity for the latter change was made apparent when it was discovered that the half dozen cards under Immigration were so soiled as to be almost illegible, while those under U. S. Immigration bore no evidence of use; either because the "See also" reference had been overlooked, or because readers were daunted or confused by the complex arrangement of the cards under United States. In all these cases the new heading differs from both the old A. L. A. heading and from the Library of Congress heading.