OFFICE OF EXPEKIMENT STATIONS. 267 



Agricultural Investigations in the Island Possessions of the United 

 States, by Walter H. Evans (Yearbook of the Department of Agricul- 

 ture, 1901, pp. 503-52(3), shows briefly the general condition of agri- 

 culture, the present status of the ptrincipal agricultural industries, and 

 traces the attempts that have been made to improve the agriculture 

 of Porto Rico, Hawaii, and the Philii^pines. 



The publications on the subjects of nutrition and irrigation issued bj'^ 

 the Office during the year are noted on pages 286 and 300, respectively. 



farmers' bulletins. 



Irrigation in Field and Garden, b}' E. J. Wickson (Farmers' Bulle- 

 tin No. 138, pp. 40, figs. 18). See p. 301. 



How to Build Small Irrigation Ditches, by C. T. Johnston and J. D. 

 Stannard (Farmers' Bulletin No. 158, pp. 28, figs. 9). See p. 301. 



Principles of Nutrition and Nutritive Value of Foods, by W. O. 

 Atwater (Farmers' Bulletin No. 142, pp. 48, charts 2). See p. 287. 



The Feeding of Farm Animals (revised edition), by E. W. Allen 

 (Farmers' Bulletin No. 22, pp. 40). This useful summary of the prin- 

 ciples on which the successful feeding of farm animals is based was 

 thoroughly revised and brought up to date. 



Experiment-Station Work. 



Three numbers (XVIII-XX, Farmers' Bulletins Nos. 133, 144, 149) 

 and a title-page, table of contents, glossary, and index to Volume I 

 of this series of bulletins, embodying in popular form some of the 

 more important practical results of the work of the experiment stations 

 in this and other countries, were issued during the year. 



CARD INDEX. 



Copy for 1,200 cards of the index of experiment-station literature 

 has been prepared in the Office and forwarded to the Division of Pub- 

 lications during the year. This index is now kept as closely up to 

 date as the conditions under which it is published will permit. The 

 number of index cards distributed has reached 22,500. The receipts 

 from sales of this index during the year were 1145.50. Owing to 

 requests for portions of the index on special topics, it has been decided 

 to break a limited number of sets to satisfj^ this demand. 



BIBLIOGRAPHICAL WORK. 



The Office has cooperated with the Library of the Department in 

 the preparation of a list of works on irrigation, land drainage, and 

 closely allied subjects. Bibliographies of the botany of maize and 

 nitrogen assimilation, and the sources of data relating to ash analyses 

 of American farm products have been added to. Considerable addi- 

 tions have also been made to the bibliography of nutrition of man and 

 animals, especially of bread and closely allied topics. 



The collection and cataloguing of publications of the agricultural 

 colleges and experiment stations in this and other countries have been 

 continued during the past year as heretofore, and a list of foreign 

 experiment stations has been prepared and published as in previous 

 years. In addition a report (Bulletin No. 112), giving brief accounts 

 of all experiment stations and related institutions of which data were 

 available, was published during the year. (See page 266.) A large 



