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INDICATORS
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indicator, where he reverses the metal case to show that the book is now in and available for issue, returns the ticket to the reader, and the transaction is completed. The ends of the reader's tickets are coloured, or are cut to different shapes, and are allowed to project, in order that they maybe readily
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seen by the librarian when looking for overdues. Different colours or shapes are employed to show the different periods of issue. Another and more exact method for doing so is by the use of tin slides, or caps of different colours, which are slipped over the upright portion of the metal case before it is returned to the indicator frame.
