Since the author phase of the catalog is of less interest than the subject phase which acquires unusual importance, secondary cards may be very largely omitted. Joint author cards are really of very little service. Series and title cards are the exception rather than the rule. Whenever possible it is advisable to make continuation cards instead of entering new compilations or new editions on separate cards. In the case of continuation cards, it is advisable to choose a brief title and pay no attention to such variations as may be given in different editions. For instance, a 1907 compilation of state tax laws might be entitled, "Laws relating to assessment and taxation," and the 1909 one simply "Taxation laws," and the 1911 one "Revenue and taxation laws." These may all be entered upon one card under the simple title, "Tax laws," and the three volumes added as continuations. In short, do not attempt to show the exact detail by means of cataloging, such as is advisable in public libraries. What your patron wishes to know is whether you have the tax laws of that state and what is the date of their compilation. These are the facts which interest him and the number of pages or the particular form of the title, is of absolutely no value to him. This is a good example of that freedom in condensation and changing of titles which is somewhat heretical in its nature, but which after all leads to that saving of time and patience which is so necessary. Use only such imprint as is absolutely essential; omitting on the whole, illustrations, maps, portraits, and plates. In cases of excerpts from periodicals the name of the magazine with the date of that particular issue is usually deemed sufficient. Because the ordinary patron of the legislative reference library is unfamiliar with library methods, it has been found convenient to file "see also" cards at the beginning of the subjects rather than at the end. For this same reason, the guide cards should be much more numerous than in other libraries, and it is of great advantage to have the main headings brought out upon thirds with the subdivisions of these main headings on fifths of a different color. Blue and manila form a good color contrast for such a scheme.