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 $5.75, 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 afforded by the ""Newberry binder,"' a 

 simple cover of enameled cardboard with a linen back, rather neatly 

 made up. 



The cards for the indexer are manifolded upon the typewriter, but 

 if many are recjuired, they are now multiplied by means of Rontgen 

 rays, according to a method invented b}' Mr. Rudolph but not yet 

 published." The titles are written, one after the other, upon sheets 



« Mr. Rudolph in this way manifolds both print and illustrations by means of the 

 Rontgen rays. He also uses a device, as simple as it is effective, for splitting apart 

 leaves that are printed or illustrated on both sides, in case it is desired to use both 



Newberry Library. Catalogue case. 



