. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 468 REPORT OF NATIONAL MUSEUM, 1903. door opened. The titles of the books are placed upon strips of card- board 4 inches long and 1 to 6 inches or more in width, as ma}^ be necessary; these are shoved into a thin tin plate or frame grooved at the sides, 15 inches long and 4i inches wide, so that each such plate nui}'^ contain 30 to 50 titles. In order to lighten the plates they are perforated with 18 holes of one-eighth inch diameter in two
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 468 REPORT OF NATIONAL MUSEUM, 1903. door opened. The titles of the books are placed upon strips of card- board 4 inches long and 1 to 6 inches or more in width, as ma}^ be necessary; these are shoved into a thin tin plate or frame grooved at the sides, 15 inches long and 4i inches wide, so that each such plate nui}'^ contain 30 to 50 titles. In order to lighten the plates they are perforated with 18 holes of one-eighth inch diameter in two rows. The plates are hung with their long edges together like an endless chain, which runs over two drums and can be turned either to the right or to the left. As the strips of cardboard are easily moved new titles may be put in as needed. A case holds 1,000 frames with 30,000 to 50,000 titles which can })e passed in review, either quickly or slowly at will. A Rudolph continuous indexer, with 500 frames for 15,000 to 25,000 titles, costs $150 and can be furnished by Thomas Kane &Co., 137 Wabash avenue, Chicago. A quite similar arrangement is the Rudolph indexer book, lig. 51. This is 12^ inches long and 8 inches wide and con- tains 10 stiff leaves for from 000 to 800 titles. It costs at the house just men- tioned $, and is also prepared in other lengths and thicknesses. Leaves may be shoved in and out at will, or a volume that has l)ecome too thick may l)e divided into two. These two methods are extensively used in the New])erry Librar}'—1,075 Rudolph in- dexer books, 103 being for the genea- logical catalogue, and 012 for the shelf and principal catalogue. A further specialty of this library is the "Rudolph pamphlet binder,'' bound on the same principle as the Rudolph indexer book shown in fig. 51, a practical and ver}" tasteful although somewhat expensive way of binding a series of pamphlets together. A cheaper and good way of binding single pamphlets is
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
