756 ANNUAL BEPOBTS OF DEPARTMENT OF AGBICUL.TUBB, 



LIBRARY. 



The library of this office consists of about 3,000 vohimes, among 

 which are inchided the publications of all State highway depart- 

 ments, geological surveys, agricultural departments, and experi- 

 ment stations, as well as those of various other State organizations 

 which publish statistical information or data of interest to the offi- 

 cials and scientists of the office. We are also receiving the publica- 

 tions of the engineering departments of nearly all cities in the United 

 States having more than 5,000 inhabitants. Foreign countries which 

 are issuing reports concerning highway activities have also placed this 

 office on their mailing list in exchange for similar courtesies from us. 



We are receiving at the present time G4 periodicals, of which 26 

 are received from the department library and 38 are mailed direct 

 from the publishers. Some of these periodicals contain compara- 

 tively little information that is of use to us, but all of them have at 

 least some data which are valuable in our research work. 



The cataloguing of the publications of the library is proceeding as 

 lapidly as possible, and we have every reason to believe that this will 

 be brought up to date during the present fiscal year. 



The librarian of this office is now engaged in compiling a bulletin 

 concerning road conditions and administration in foreign countries. 

 The information for this publication is being drawn from the reports 

 of American consuls and the printed information which they have 

 secured from the Governments where they are stationed. 



PUBLICATIONS. 



The preparation of 15 publications has been carried on during the 

 fiscal year 1911, but of these only 3 were issued during that year. 

 These are: Bitumens and their Essential Constituents (Circular 93) ; 

 Progress Reports of Experiments in Dust Prevention and Eoad 

 Preservation (Circular 94) ; and the annual report of this office for 

 1910. 



Eight other publications were prepared during the year and have 

 since been issued. These are as follows: Descriptive Catalogue of 

 Road Model Exhibits (Bulletin 36) ; Examination and Classification 

 of Rocks for Road Building (Bulletin 37, revised edition) ; Methods 

 for the Examination of Bituminous Road Materials (Bulletin 38) ; 

 Highway Bridges and Culverts (Bulletin 39) ; Special Road Prob- 

 lems in the Southern States (Circular 95) ; Use of Concrete on the 

 Farm (Farmers' Bulletin 461) ; Bituminous Dust Preventives and 

 Road Binders (Yearbook Extract 538) ; and Progress and Present 

 Status of the Good Roads Movement in the United States (Yearbook 

 Extract 535). 



There are four other bulletins on which a considerable amount of 

 work was done during the fiscal year 1911. Two of these are nearing 

 publication, namely. Bulletin 40 (Road Material Resources of Min- 

 nesota) and Bulletin 41 (Mileage and Cost of Public Roads in the 

 United States in 1909). 



Publications are now being prepared on the subject of Road Mate- 

 rial Testing Laboratories, on the Condition and Administration of 



