The reasons for the success or failure of such laws, and the differences in economic or local conditions in two communities must always receive serious consideration by those who are endeavoring to meet the advancing economic demands for properly constructed and better laws. The comparative element of this vast accumulation of material must always be remembered, not only in the care, but also in the gathering of material, if the library is to serve its highest purpose. Because of this and other well known characteristics of a library of this type, the demands are of a peculiar nature and cannot be met by the ordinary library material treated in the usual library method. It is more or less of a quasi-library, requiring an adaptation of library processes to a combination of office and library work. As a result of this difference, the general library rules for cataloging must be decidedly modified. One is justified in making the catalog of such a library a law unto itself, for each and every one of its class has its own particular problems, environment and limitations, which will probably be met in its own particular way. Since the problem becomes so largely one of individuality and circumstances, it might be well to consider for a moment some of the essential differences in purpose and treatment of material, and to realize the desirable points to be attained as well as the non-essentials, or things actually to be avoided. The processes and methods of this kind of a library must in their nature be conducive to rapidity and conciseness of service. Time saving devices are unusually important, not only in the acquisition of material and the actual technical work, but in the delivery of material. The speedy availability of the most serious treatises on the most profound subjects is absolutely necessary. Between sessions many, many hours of the most earnest and serious efforts must be spent in investigation, study and research in order to relieve the pressure of heavy research work as much as possible during the session. The library deals with business men who are seeking an answer to some special need. They have a definite reason for seeking the information and a definite point of view and they expect the library to answer their questions in a business-like manner. Too much emphasis cannot be placed upon _efficiency_ of service as shown through _rapidity_ of service. The legislator is a busy man and any time saved through devices which quicken delivery of material, or shorten the time devoted by the patron himself, is well worth while. If two hours is necessary on the part of the library worker between sessions to put material into such shape that it may be delivered ten minutes sooner during the legislative session, it should be given cheerfully.