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The Use of the General Collection in the Library of Congress

A study of collections use in the Library of Congress was conducted using comparisons of holdings statistics to use data. The results replicated some findings of earlier studies, notably the disproportionately heavy use of recent materials, English-language publications, and monographs. Among other new findings, the study concluded that interest in serial publications may not decay so much more quickly than interest in monographs as has been suggested, and that user preference for English-language materials is especially pronounced for serial publications. Particular attention was paid to tracing the joint or interactive effects of the age of materials and subject area on use levels. Here the results indicated that in the first decade after publication obsolescence is especially marked for materials in the natural and social sciences but that thereafter the process of decay (which becomes increasingly gradual) tends to be more nearly uniform for the collection as a whole.