496 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



journals, and the suspension of its publication brought many expres- 

 sions of regret not only from its engineer subscribers, but also from 

 the nontechnical administrative heads of county highway activities 

 to whom it had been helpful. Not the least gratifying of such expres- 

 sions were those which came entirely without solicitation from the 

 editors of other technical engineering journals. In view of the many- 

 important researches which are being conducted by the bureau with 

 its own forces and in cooperation with other research agencies, and 

 the absolute necessity of a medium by which the results of these 

 investigations can be given to the public, it is hoped that authority 

 to resume publication will be granted as promptly as possible. 



In cooperation with the Highway Education Board, on which are 

 represented with the bureau, the United States Bureau of Education, 

 the War Department, the Society for Engineering Education, and 

 various industries interested in the development of an adequate 

 highway system, a great deal of valuable work has been done look- 

 ing to the stimulation of technical education in highway and high- 

 way transport engineering. By direct contact with educators in 

 conferences held at a number of the larger engineering schools, by 

 lending its assistance in devising courses of study, and by supplying 

 material for instruction in the form of stereopticon slides, motion- 

 picture films and models of various types of roads the experience and 

 resources of the bureau have been placed at the disposal of the col- 

 leges. Special sets of small models light enough to be cheaply trans- 

 Eorted from school to school and strong enough to stand repeated 

 andling have been made for this purpose, and new lantern slides 

 descriptive of the latest engineermg practice are also being made. 



Six motion-picture films, each approximately 1,000 feet in length, 

 were developed during the year in cooperation with the Division of 

 Publications. With the other films previously prepared there are 

 now at the disposal of the department motion pictures depicting the 

 construction of every important type of road, with the exception of 

 the gravel road, and, in addition, three pictures which show the con- 

 struction of roads in the national forests. 



In addition to the exhibits displayed at agricultural fairs under 

 the auspices of the Office of Exhibits, the bureau lias also prepared 

 large exhibits for use at the more important highway engineering 

 conventions and other gatherings of persons especially interested in 

 the highways. The more important of these displays were made at 

 the annual convention of the American Association of State Highway 

 Officials at Omaha, Nebr., the meeting of the American Road Build-^ 

 ers' Association at Chicago, and the automobile show at New York. 



As a contribution to the department's exhibit at the international 

 exposition at Rio de Janeiro, Brazil, the bureau prepared a large 

 model of a gravel road in course of construction with a realistic back- 

 ground supplied by an oil painting. This exhibit is one of the most 

 ambitious that the bureau has attempted, and it has proved to be a 

 most interesting and instructive as well as very beautiful addition to 

 the American display at the Brazilian exposition. 



Another contribution to American activity in connection with this 

 exposition was made indirectly through the special highway bulletin 

 of the Pan American Union issued in March. Most of the material 

 in this publication was prepared by the bureau. 



