number 'of cards within reasonable limits. Where the index, however, 

 is used in its entirety, as planned, cross references lessen the difficulty 

 from this source. 



The divisions and subdivisions are arranged on a decimal system and 

 are plainly indicated by the use of division cards of different colors. 



The index is printed on cards 2 by 5 inches in size. Each index card 

 contains an appropriate title, the author of the article, a reference to 

 the publication in which it appeared and to the Experiment Station 

 Kecord in which an abstract of the article may be found, and a con- 

 densed statement of its contents. At the upper right-hand corner of the 

 card is a number indicating under what heading the card should be 

 placed in the index. The order in which the cards are printed is indi- 

 cated at the lower left-hand corner. It is designed that the cards should 

 be arranged in alphabetical and chronological order under the final sub- 

 divisions of the index. 



One copy of the index is sent without charge to each of the agricul- 

 tural colleges and experiment stations and to several of the State 

 boards and commissioners of agriculture. Besides this free distribution, 

 the Office is prepared, under authority of the law, to furnish a limited 

 number of sets of the index at a price only sufficient to cover addi- 

 tional cost of printing. This is estimated at $2 per thousand cards. 

 For the division cards an additional charge of $1.25 is made. 



A few sets of the index, have been hrolien, and separate 

 divisions may be obtained at the same rate per tJiottsand 

 cards, 



A key to the index, containing the system of classification, is sent 

 with the first installment of cards and also on application. 



Sets of division cards and 29,500 index cards, bringing the index up, 

 approximately, to September 1, 1908, are available, and one of these 

 sets will be sent to any address upon receipt of $60.25. Subscribers 

 are also informed when each successive lot of 1,000 cards is ready for 

 distribution. About 1,000 cards are required for the station publica- 

 tions issued each year. Only 300 copies of the index are printed. 



Payments should be made by United States money order in favor of 

 A. Zappone, Disbursi'ig Offiegr, but, like all other communications 

 relating to the index. , ' nM be forwarded in envelopes addressed to 

 the Director of the Oil Je i,: i. ;periment Stations. 



Respectfully submite^. 



A. C. True, 



Approved : Director. 



James Wilson 



Secretary «' Agnalture. 



Washington, D. C .Voww: er 25, 1908. 



, O 



