Since legislators are investigating specific problems, looking at them from a single point of view, and not always considering a subject in its broadest sense or in its relationship to knowledge in general, the question of subject headings, outside of classification, becomes practically the most important single proposition the cataloger has to consider. In practically every case the popular rather than the technical form of heading is desirable. The simple ordinary term should be chosen, for it is under this type of heading that your reader will be most certain to look. In his haste and absorption he fails to realize that there is any possible viewpoint, other than his own. Having but one thought in his mind, he naturally expects to find his material under this subject. Most certainly he should find at least a cross reference. Therefore, one recommendation is to be exceedingly generous in the matter of cross references. Under such conditions it is always wiser not to trust one's own judgment, but to call upon various people asking under what heading they would look for material of a certain type. In this way the cataloger may secure suggestions which are unusually helpful and which put into the catalog the ideas of many persons rather than of one. For instance, a book or pamphlet relating to the extortion practiced by usurers would be found under a heading such as "Interest" or "Usury." However, there are various other headings under which individuals might expect to find material of this kind, depending upon the particular phase of the question which he had in mind at the time. A busy man, wishing to draft a bill putting the loan shark under control, would be thinking of a loan shark and not of the underlying principle of interest. Another man approaching the question through interest in the installment plan would expect to find material of use to him under that subject. Another man taking a broader view of the subject might look under "Interest." Each of these men would be justified in looking under the particular subject he had in mind, expecting to find either the material or a reference sending him to the chosen heading. Every possible heading which suggests itself is worthy of consideration, for such an investment of time will more than pay for itself in the satisfaction it brings to those who use the catalog. The necessity for painstaking effort and careful thought in this connection is verified by experience.