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I C A R D S and marginal punched cards were introduced as charge records in the 1930's because these punched cards made possible the reduction of costs in academic and special libraries by combining the chronological record with the book record. One of the next major reductions in staff time required to administer circulation records will come from simplifying the sending of overdue notices. Although the recently published Study of Circulation Control Systems mentions that the Bookamatic charging system can supply overdue notices mechanically1, the Study does not describe in detail a system which dispenses with writing overdues aside from those systems producing photographic or other image reproductions. However, descriptions of systems, including Bookamatic, that make writing notices unnecessary have appeared in the literature. In 1955 the Annual Report of the Yale Medical Library gave a brief account of a system installed in December 19542. The new charge card was a triplicate marginal punched form with one-time carbons inserted. In the same year, Helen T . Geer briefly described the Bookamatic system which the Addressograph-Multigraph Company was then developing3, and in 1956 she again reported on Bookamatic stating that a pilot project had been installed in the Midland Public Library, Midland, Michigan, during the summer of 1956.4 In the next several years, there

Marginal Punched Charge card Form Facilitates Sending Overdue Notices